May 2021 - ffmpeg-user - lists.ffmpeg.org

fps output stuck at 5fps with flv / rtmp outpu
by Andrew Peng 26 May '21

26 May '21

I have a problem with ffmpeg 4.1.6 (raspbian release) that is really strange. I'm trying to stream a webcam to an rtmp endpoint and the framerate is stuck at 5fps. Things i've checked: - camera can do 25fps at 800x600 with mjpeg or raw output, verified with v4l2-ctl and ffmpeg - camera works to stream 25fps output on a windows computer using obs - camera is able to generate a test mp4 file saved locally using ffmpeg at 25fps The problem is that the framerate plummets to 5fps when I add the -f flv output option, even when saving to a local file. If I change the output type to mp4, it can output at 25fps. This happens when using the h264_omx and libx264 encoding engines. Is there any particular reason why the output is getting nuked to 5fps when using the flv output? Here is the command line i'm using: ffmpeg -video_size 800x600 -input_format yuyv422 -i /dev/video0 -vcodec h264_omx -b:v 1024k -vf drawtext="fontsize=20: box=1: boxcolor=black(a)0.75: boxborderw=5: fontcolor=white: x=5: y=(h-text_h-5): text='%{localtime\:%m/%d/%Y - %T}'" -f flv rtmp://rtmp.server.here

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Video Freezing Halfway Through on Subsequent Encodes
by Craig L. 25 May '21

25 May '21

Hi! Sorry for the repost, but I think my original post got lost in the shuffle. I am having issues where a video stream is freezing at some point within the video while the rest of the elements are encoded fine. On the same server, if the same command is run multiple times, this will happen once and if it is re-encoded all will turn out ok. I have the working example and the failed example below. I have not been able to try it on the latest GIT version as I rely on our host to update, so wanted to see if there was an obvious issue before I go that route. I have seperated out the sections that are different between the two encodes. Thank you! Craig **WORKING ENCODEMAIN VIDEO (**original-video.MP4) DOES NOT FREEZE. * /usr/local/bin/ffmpeg -safe 0 -f concat -i canvas.txt -safe 0 -f concat -i overlay-text-concat.txt -i original-video.MP4 -i overlay-video.mov -filter_complex_script complex-filter.txt -aspect 1:1 -c:v libx264 -profile:v high -pix_fmt yuv420p -level 5.1 -vsync 1 -async 1 -c:a aac -b:a 128k -map 2:a -t 19.15 -r 30 -y finished-video.mp4 ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, concat, from 'canvas.txt': Duration: 00:00:19.15, start: 0.000000, bitrate: 0 kb/s Stream #0:0: Video: targa, gray, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #1, concat, from 'overlay-text-concat.txt': * * * Duration: 00:00:19.15, start: 0.000000, bitrate: 0 kb/s* Stream #1:0: Video: targa, bgra, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'original-video.MP4': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2021-05-21T04:06:55.000000Z com.apple.quicktime.software: SCRecorder com.apple.quicktime.creationdate: 2021-05-20T14:49:00-04:00 com.apple.photos.originating.signature: ASx36uUj/ZZKOHKYPUNOzGvtnPAp Duration: 00:00:19.15, start: 0.000000, bitrate: 15901 kb/s Stream #2:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 304 kb/s (default) Metadata: creation_time : 2021-05-21T04:06:55.000000Z handler_name : Core Media Audio Stream #2:1(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x720, 15587 kb/s, 59.95 fps, 60 tbr, 600 tbn, 1200 tbc (default) Metadata: creation_time : 2021-05-21T04:06:55.000000Z handler_name : Core Media Video encoder : H.264 Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'overlay-video.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.45.100 Duration: 00:00:19.16, start: 0.000000, bitrate: 82 kb/s Stream #3:0: Video: png (png / 0x20676E70), rgba(pc, progressive), 1280x26, 81 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.91.100 png Stream mapping: Stream #0:0 (targa) -> overlay:main Stream #0:0 (targa) -> scale Stream #1:0 (targa) -> overlay:overlay Stream #2:0 (aac) -> atrim Stream #2:1 (h264) -> trim Stream #3:0 (png) -> scale concat:out:a0 -> Stream #0:0 (aac) overlay -> Stream #0:1 (libx264) Press [q] to stop, [?] for help -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0. * * *[swscaler @ 0x6f1e5c0] deprecated pixel format used, make sure you did set range correctly** **[libx264 @ 0x5cde0c0] using SAR=1/1** **[libx264 @ 0x5cde0c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512** **[libx264 @ 0x5cde0c0] profile High, level 5.1, 4:2:0, 8-bit** **[libx264 @ 0x5cde0c0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=40 lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00* Output #0, mp4, to 'finished-video.mp4': Metadata: encoder : Lavf58.45.100 Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: encoder : Lavc58.91.100 aac Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x1280 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default) Metadata: encoder : Lavc58.91.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A * * *frame= 22 fps=0.0 q=0.0 size= 0kB time=00:00:01.81 bitrate= 0.2kbits/s dup=0 drop=17 speed=3.61x** **frame= 49 fps= 49 q=0.0 size= 0kB time=00:00:02.73 bitrate= 0.1kbits/s dup=0 drop=45 speed=2.72x me= 78 fps= 52 q=0.0 size= 0kB time=00:00:03.69 bitrate= 0.1kbits/s dup=0 drop=73 speed=2.45x** **fra 106 fps= 53 q=29.0 size= 256kB time=00:00:04.60 bitrate= 455.2kbits/s dup=0 drop=101 speed=2.29x me= fps= 53 q=29.0 size= 512kB time=00:00:05.52 bitrate= 759.2kbits/s dup=0 drop=129 speed= 2.2x ** **fra 164= 54 q=29.0 size= 1024kB time=00:00:06.57 bitrate=1276.7kbits/s dup=0 drop=159 speed=2.18x ** **frame= fps q=29.0 size= 1280kB time=00:00:07.61 bitrate=1376.9kbits/s dup=0 drop=190 speed=2.16x ** **frame= 227= 569.0 size= 1536kB time=00:00:08.68 bitrate=1449.2kbits/s dup=0 drop=222 speed=2.16x ** **frame= 261 fps q=2size= 1792kB time=00:00:09.77 bitrate=1502.5kbits/s dup=0 drop=255 speed=2.16x ** **frame= 294 fps= 589.0 = 2048kB time=00:00:10.92 bitrate=1536.0kbits/s dup=0 drop=289 speed=2.17x ** **frame= 330 fps= 60 q=2size 2560kB time=00:00:12.07 bitrate=1736.9kbits/s dup=0 drop=325 speed=2.18x ** **frame= 361 fps= 60 q=29.0 = 6kB time=00:00:13.14 bitrate=1755.5kbits/s dup=0 drop=357 speed=2.18x ** **frame= 396 fps= 61 q=29.0 size 307time=00:00:14.27 bitrate=1763.3kbits/s dup=0 drop=390 speed=2.18x ** **frame= 426 fps= 60 q=29.0 size= 8kB =00:00:15.31 bitrate=1779.9kbits/s dup=0 drop=420 speed=2.17x ** **frame= 456 fps= 60 q=29.0 size= 358time00:16.32 bitrate=1799.1kbits/s dup=0 drop=450 speed=2.16x ** **frame= 492 fps= 61 q=29.0 size= 4096kB =00:7.47 bitrate=1920.5kbits/s dup=0 drop=486 speed=2.17x ** **frame= 523 fps= 61 q=29.0 size= 4352kB time00:1 bitrate=1923.1kbits/s dup=0 drop=518 speed=2.17x ** **frame= 561 fps= 62 q=29.0 size= 4608kB time=00:9.09rate=1977.1kbits/s dup=0 drop=554 speed=2.11x ** **frame= 575 fps= 61 q=-1.0 Lsize= 5618kB time=00:00:5 bie=2402.5kbits/s dup=0 drop=570 speed=2.02x ** **video:5296kB audio:301kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.391604%** **[aac @ 0x5cdcd00] Qavg: 236.376** **[libx264 @ 0x5cde0c0] frame I:3 Avg QP:19.31 size:102100** **[libx264 @ 0x5cde0c0] frame P:156 Avg QP:20.57 size: 22361** **[libx264 @ 0x5cde0c0] frame B:416 Avg QP:24.59 size: 3913** **[libx264 @ 0x5cde0c0] consecutive B-frames: 2.6% 1.7% 3.1% 92.5%** **[libx264 @ 0x5cde0c0] mb I I16..4: 16.9% 63.4% 19.7%** **[libx264 @ 0x5cde0c0] mb P I16..4: 2.9% 6.2% 0.8% P16..4: 21.2% 9.8% 6.0% 0.0% 0.0% skip:53.0%** **[libx264 @ 0x5cde0c0] mb B I16..4: 0.2% 0.3% 0.0% B16..8: 22.9% 2.6% 0.3% direct: 0.7% skip:73.0% L0:42.4% L1:50.0% BI: 7.6%** **[libx264 @ 0x5cde0c0] 8x8 transform intra:62.5% inter:82.8%** **[libx264 @ 0x5cde0c0] coded y,uvDC,uvAC intra: 43.6% 34.8% 2.4% inter: 7.6% 5.7% 0.0%** **[libx264 @ 0x5cde0c0] i16 v,h,dc,p: 29% 31% 9% 31%** **[libx264 @ 0x5cde0c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 19% 23% 5% 5% 6% 6% 6% 8%** **[libx264 @ 0x5cde0c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 15% 10% 4% 12% 14% 9% 6% 4%** **[libx264 @ 0x5cde0c0] i8c dc,h,v,p: 61% 18% 18% 3%** **[libx264 @ 0x5cde0c0] Weighted P-Frames: Y:0.0% UV:0.0%** **[libx264 @ 0x5cde0c0] ref P L0: 57.2% 17.3% 18.8% 6.7%** **[libx264 @ 0x5cde0c0] ref B L0: 90.4% 7.7% 1.9%** **[libx264 @ 0x5cde0c0] ref B L1: 96.5% 3.5%** **[libx264 @ 0x5cde0c0] kb/s:2263.23** ** * **WORKING ENCODEMAIN VIDEO (**original-video.MP4) FREEZES AT SOME POINT* Command: /usr/local/bin/ffmpeg -safe 0 -f concat -i canvas.txt -safe 0 -f concat -i overlay-text-concat.txt -i original-video.MP4 -i overlay-video.mov -filter_complex_script complex-filter.txt -aspect 1:1 -c:v libx264 -profile:v high -pix_fmt yuv420p -level 5.1 -vsync 1 -async 1 -c:a aac -b:a 128k -map 2:a -t 19.15 -r 30 -y finished-video.mp4 ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, concat, from 'canvas.txt': Duration: 00:00:19.15, start: 0.000000, bitrate: 0 kb/s Stream #0:0: Video: targa, gray, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #1, concat, from 'overlay-text-concat.txt': Duration: 00:00:19.15, start: 0.000000, bitrate: 0 kb/s Stream #1:0: Video: targa, bgra, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'original-video.MP4': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2021-05-21T04:06:55.000000Z com.apple.quicktime.software: SCRecorder com.apple.quicktime.creationdate: 2021-05-20T14:49:00-04:00 com.apple.photos.originating.signature: ASx36uUj/ZZKOHKYPUNOzGvtnPAp * Duration: 00:00:19.15, start: 0.000000, bitrate: 14050 kb/s* Stream #2:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 304 kb/s (default) Metadata: creation_time : 2021-05-21T04:06:55.000000Z handler_name : Core Media Audio Stream #2:1(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1280x720, 15587 kb/s, 59.95 fps, 60 tbr, 600 tbn, 1200 tbc (default) Metadata: creation_time : 2021-05-21T04:06:55.000000Z handler_name : Core Media Video encoder : H.264 Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'overlay-video.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.45.100 Duration: 00:00:19.16, start: 0.000000, bitrate: 82 kb/s Stream #3:0: Video: png (png / 0x20676E70), rgba(pc, progressive), 1280x26, 81 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.91.100 png Stream mapping: Stream #0:0 (targa) -> overlay:main Stream #0:0 (targa) -> scale Stream #1:0 (targa) -> overlay:overlay Stream #2:0 (aac) -> atrim Stream #2:1 (h264) -> trim Stream #3:0 (png) -> scale concat:out:a0 -> Stream #0:0 (aac) overlay -> Stream #0:1 (libx264) Press [q] to stop, [?] for help -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0. * * *[swscaler @ 0x7c5c2c0] deprecated pixel format used, make sure you did set range correctly** **[libx264 @ 0x6a1b0c0] using SAR=1/1** **[libx264 @ 0x6a1b0c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512** **[libx264 @ 0x6a1b0c0] profile High, level 5.1, 4:2:0, 8-bit** **[libx264 @ 0x6a1b0c0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=40 lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00* Output #0, mp4, to 'finished-video.mp4': Metadata: encoder : Lavf58.45.100 Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: encoder : Lavc58.91.100 aac Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x1280 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default) Metadata: encoder : Lavc58.91.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A * * * * *frame= 23 fps=0.0 q=0.0 size= 0kB time=00:00:01.87 bitrate= 0.2kbits/s dup=0 drop=18 speed=3.75x** **frame= 48 fps= 48 q=0.0 size= 0kB time=00:00:02.68 bitrate= 0.1kbits/s dup=0 drop=43 speed=2.67x me= 72 fps= 48 q=0.0 size= 0kB time=00:00:03.47 bitrate= 0.1kbits/s dup=0 drop=67 speed=2.31x ** **fra 97 fps= 48 q=29.0 size= 256kB time=00:00:04.33 bitrate= 484.3kbits/s dup=0 drop=93 speed=2.15x ** **frame= fps= 49 q=29.0 size= 512kB time=00:00:05.16 bitrate= 812.5kbits/s dup=0 drop=117 speed=2.05x ** **frame= 147= 49 q=29.0 size= 768kB time=00:00:05.99 bitrate=1049.6kbits/s dup=0 drop=141 speed=1.98x ** **frame= 174 fps q=29.0 size= 1024kB time=00:00:06.91 bitrate=1213.7kbits/s dup=0 drop=169 speed=1.96x ** **frame= 202 fps= 509.0 size= 1280kB time=00:00:07.85 bitrate=1335.7kbits/s dup=0 drop=197 speed=1.95x ** **frame= 231 fps= 51 q=2size= 1792kB time=00:00:08.81 bitrate=1666.2kbits/s dup=0 drop=226 speed=1.94x ** **frame= 261 fps= 52 q=29.0 = 1792kB time=00:00:09.77 bitrate=1502.5kbits/s dup=0 drop=255 speed=1.94x ** **frame= 291 fps= 53 q=29.0 size 2048kB time=00:00:10.81 bitrate=1551.2kbits/s dup=0 drop=286 speed=1.95x ** **frame= 321 fps= 53 q=29.0 size= 0kB time=00:00:11.75 bitrate=1784.1kbits/s dup=0 drop=315 speed=1.94x ** **frame= 351 fps= 54 q=29.0 size= 281time=00:00:12.80 bitrate=1802.3kbits/s dup=0 drop=345 speed=1.95x ** **frame= 383 fps= 54 q=29.0 size= 3072kB =00:00:13.84 bitrate=1817.7kbits/s dup=0 drop=377 speed=1.96x ** **frame= 413 fps= 55 q=29.0 size= 3328kB time00:14.84 bitrate=1836.2kbits/s dup=0 drop=407 speed=1.96x ** **frame= 442 fps= 55 q=29.0 size= 3584kB time=00:5.85 bitrate=1852.3kbits/s dup=0 drop=436 speed=1.96x ** **frame= 471 fps= 55 q=29.0 size= 3840kB time=00:00:1 bitrate=1873.7kbits/s dup=0 drop=465 speed=1.96x ** **frame= 496 fps= 55 q=29.0 size= 4096kB time=00:00:17.62rate=1904.2kbits/s dup=0 drop=490 speed=1.94x ** **[mov,mp4,m4a,3gp,3g2,mj2 @ 0x6a12800] Packet corrupt (stream = ts = 10090).** **original-video.mp4: corrupt input packet in stream 1** **[h264 @ 0x6b24240] Invalid NAL unit size (43388 > 14185).** **[h264 @ 0x6b24240] Error splitting the input into NAL units.** **Error while decoding stream #2:1: Invalid data found when processing input** **frame= 575 fps= 59 q=-1.0 Lsize= 5211kB time=00:00:19.06 bitrate=2239.0kbits/s dup=21 drop=502 speed=1.97x** **video:4910kB audio:280kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.404954%** **[aac @ 0x6a19d00] Qavg: 236.078** **[libx264 @ 0x6a1b0c0] frame I:3 Avg QP:19.22 size:103727** **[libx264 @ 0x6a1b0c0] frame P:156 Avg QP:19.93 size: 20746** **[libx264 @ 0x6a1b0c0] frame B:416 Avg QP:23.28 size: 3556** **[libx264 @ 0x6a1b0c0] consecutive B-frames: 2.6% 1.7% 3.1% 92.5%** **[libx264 @ 0x6a1b0c0] mb I I16..4: 17.1% 63.3% 19.7%** **[libx264 @ 0x6a1b0c0] mb P I16..4: 2.8% 6.0% 0.8% P16..4: 19.1% 8.8% 5.2% 0.0% 0.0% skip:57.3%** **[libx264 @ 0x6a1b0c0] mb B I16..4: 0.2% 0.3% 0.0% B16..8: 20.4% 2.4% 0.3% direct: 0.6% skip:75.8% L0:42.4% L1:50.1% BI: 7.5%** **[libx264 @ 0x6a1b0c0] 8x8 transform intra:62.4% inter:82.9%** **[libx264 @ 0x6a1b0c0] coded y,uvDC,uvAC intra: 44.3% 35.3% 2.8% inter: 6.9% 5.3% 0.0%** **[libx264 @ 0x6a1b0c0] i16 v,h,dc,p: 29% 31% 9% 31%** **[libx264 @ 0x6a1b0c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 19% 22% 5% 5% 6% 6% 6% 8%** **[libx264 @ 0x6a1b0c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 15% 10% 4% 12% 14% 9% 6% 4%** **[libx264 @ 0x6a1b0c0] i8c dc,h,v,p: 61% 18% 18% 3%** **[libx264 @ 0x6a1b0c0] Weighted P-Frames: Y:0.0% UV:0.0%** **[libx264 @ 0x6a1b0c0] ref P L0: 57.7% 17.4% 18.3% 6.7%** **[libx264 @ 0x6a1b0c0] ref B L0: 90.4% 7.7% 1.9%** **[libx264 @ 0x6a1b0c0] ref B L1: 96.5% 3.5%** **[libx264 @ 0x6a1b0c0] kb/s:2098.20*

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DASH-LL audio & video segment files created at different rates
by Danny Wilson 25 May '21

25 May '21

I'm trying to use FFmpeg to simulate a "live" DASH-LL from a file. However, the audio "m4s" files and the video "m4s" files are not being created at the same rate. The video files lag significantly behind the audio (i.e., they don't exist). This causes issues with the player since it tries to fetch both audio and video segments with a given index. e.g. it tries to fetch chunk-stream0-018.m4s and chunk-stream1-018.m4s but the stream0 chunk (video) hasn't yet been created by FFmpeg causing the player to give a 404 error. For example, encoding just 60 seconds ends up with these files in the web root folder: init-stream0.m4s init-stream1.m4s chunk-stream0-00001.m4s chunk-stream1-00019.m4s chunk-stream0-00002.m4s chunk-stream1-00020.m4s chunk-stream0-00003.m4s chunk-stream1-00021.m4s chunk-stream0-00004.m4s chunk-stream1-00022.m4s chunk-stream0-00005.m4s chunk-stream1-00023.m4s chunk-stream0-00006.m4s chunk-stream1-00024.m4s chunk-stream0-00007.m4s chunk-stream1-00025.m4s chunk-stream0-00008.m4s chunk-stream1-00026.m4s chunk-stream0-00009.m4s chunk-stream1-00027.m4s chunk-stream0-00010.m4s chunk-stream1-00028.m4s chunk-stream0-00011.m4s chunk-stream1-00029.m4s chunk-stream0-00012.m4s chunk-stream1-00030.m4s chunk-stream1-00031.m4s So the player requests chunk-stream0-29.m4s which gives a 404 error because it doesn't exist yet. The command line is: ffmpeg -loglevel info -re -i /mnt/swdevel/TestStreams/H264/ThreeHourLongMovie.mp4 -t 60 \ -c:v libx264 -x264-params keyint=120:scenecut=0 -b:v 1M -c:a copy \ -f dash -dash_segment_type mp4 \ -seg_duration 2 \ -target_latency 3 \ -frag_type duration \ -frag_duration 0.2 \ -window_size 10 \ -extra_window_size 3 \ -streaming 1 \ -ldash 1 \ -use_template 1 \ -use_timeline 0 \ -write_prft 1 \ -fflags +nobuffer+flush_packets \ -format_options "movflags=+cmaf" \ -utc_timing_url "/pelican/testPlayers/time.php" \ master.mpd The <SegmentTemplate> in the MPD file shows the same timescale and duration for both stream0 and stream1: <SegmentTemplate timescale="1000000" duration="2000000" availabilityTimeOffset="1.800" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1"> Both dash.js and shaka player and the stream doesn't play. I've also tried using a VLSI hardware encoder instead of libx264 but same result so the issue is the the mixer (??) Any suggestions on how fix this? Danny OS: Centos 8 ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (GCC) configuration: --extra-ldflags='-L/mnt/swdevel/Torque/lib3p64 -L/lib' --extra-cflags='-I/mnt/swdevel/Torque/include -I/mnt/swdevel/Torque/ext/extinclude/ -I/include' --disable-static --enable-shared --disable-cuda --disable-cuvid --disable-nvenc --enable-libx264 --enable-gpl --enable-libfreetype --enable-libfontconfig --enable-libv4l2 --enable-indev=alsa --enable-indev=v4l2 --bindir=/mnt/swdevel/Torque/bin64 --datadir=/mnt/swdevel/Torque/ext/ffmpeg-build --docdir=/mnt/swdevel/Torque/ext/doc --libdir=/mnt/swdevel/Torque/lib3p64 --shlibdir=/mnt/swdevel/Torque/lib3p64 --incdir=/mnt/swdevel/Torque/ext/extinclude/ffmpeg --mandir=/mnt/swdevel/Torque/ext/ffmpeg-build64 --enable-libxcoder --disable-doc --enable-x86asm --extra-ldflags=-lm --enable-pthreads --extra-libs=-lpthread --disable-debug libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100

1 0

dshow and gdigrab formats missing NOSEEK flags?
by Diederick C. Niehorster 24 May '21

24 May '21

Dear Sir, Madam, I am trying to figure out whether a format is seekable. It was suggested to me to check the context->iformat (AVInputFormat) flags and whether read_seek/read_seek2 are non-NULL. That however does not work correctly for the dshow and gdigrab avdevice input formats, as these do not set any of AVFMT_NOBINSEARCH, AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK. Is that an oversight, since these avdevices are realtime and do not support seeking? Trying to seek these formats anyway leads to a Invalid argument error, not an operation not permitted as one would expect, see, e.g.: ffprobe -f dshow -i "video=Integrated Webcam" -show_frames -read_intervals 12%13 [...] Input #0, dshow, from 'video=Integrated Webcam': Duration: N/A, start: 331739.487000, bitrate: N/A Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 10000k tbn, 10000k tbc Could not seek to position 12000000: Invalid argument Could not read packets in interval id:0 start:12 end:13 That is with ffprobe version 4.4-full_build-www.gyan.dev (commit ref f68ab9de4e). I'd be happy to provide a patch. Looking at the source, this is also the case for at least the v4l2, vfwcap, x11grab, fbdev, kmsgrab and android_camera devices, but i would not be able to test most of these. Thanks and all the best, Dee

1 0

FFmpeg capture, mkvtimestamp_v2, vsync 0 and timecode don't play nice
by Bouke 24 May '21

24 May '21

Trying to capture and modify the TC in-file afterwards. I've found a nice way to store the timestamps from the capture. (https://stackoverflow.com/questions/53391150/ffmpeg-obtain-the-system-time-…) This works fine using this line: ffmpeg -hide_banner -f "decklink" -queue_size "1073741824" -raw_format "auto" -format_code "Hi50" -video_input "sdi" -i "bm mini One" -filter_complex "settb=1/1000,setpts=RTCTIME/1000-1500000000000,mpdecimate,split[out][ts];[out]setpts=N/25/TB[out]" -map "[out]" -c:a "copy" -c:v "prores" -profile:v "1" -vendor "ap10" -pix_fmt "yuv422p10le" "/Volumes/Data/tst1.mov" -map "[ts]" -f mkvtimestamp_v2 "/Volumes/Data/time.txt" -vsync 0 But, when I add -timecode "00:00:00:00" (to force a TC atom in the output), horrible things happen. ffmpeg -f "decklink" -queue_size "1073741824" -raw_format "auto" -format_code "Hi50" -video_input "sdi" -i "bm mini One" -filter_complex "settb=1/1000,setpts=RTCTIME/1000-1500000000000,mpdecimate,split[out][ts];[out]setpts=N/25/TB[out]" -map "[out]" -timecode "00:01:00:00" -c:a "copy" -c:v "prores" -profile:v "1" -vendor "ap10" -pix_fmt "yuv422p10le" "/Volumes/Data/tst1.mov" -map "[ts]" -f mkvtimestamp_v2 "/Volumes/Data/time.txt" -vsync 0 The timecode does not run at the video speed, skips a frame or two here and there, and the image freezes after a random amount of time (between 10 seconds and a minute or so). How come the timecode can mess up stuff that much? From what I understand it's just a couple of atoms in the moov atom, and a reference where the actual TC value (as frames) is stored in the mdat. I highly suspect the -vsync 0 to also work on the video. If I omit that, the video is fine, the TC is fine, but there is no metadata output, just the # timecode format v2 The alternative to this dance is to use -timestamp_align, but I also want to use non-decklink audio, and I can’t get that in sync. (Using -ss for sound is not accurate.) Bouke Output from the terminal: (non-working file) bouke@Boukes-iMac ~ % ffmpeg -f "decklink" -queue_size "1073741824" -raw_format "auto" -format_code "Hi50" -video_input "sdi" -i "bm mini One" -filter_complex "settb=1/1000,setpts=RTCTIME/1000-1500000000000,mpdecimate,split[out][ts];[out]setpts=N/25/TB[out]" -map "[out]" -timecode "00:01:00:00" -c:a "copy" -c:v "prores" -profile:v "1" -vendor "ap10" -pix_fmt "yuv422p10le" "/Volumes/Data/tst1.mov" -map "[ts]" -f mkvtimestamp_v2 "/Volumes/Data/time.txt" -vsync 0 ffmpeg version git-2021-03-31-b3e9a84 Copyright (c) 2000-2021 the FFmpeg developers built with Apple clang version 12.0.0 (clang-1200.0.32.29) configuration: --enable-videotoolbox --enable-nonfree --enable-gpl --enable-lv2 --enable-openssl --enable-libsvtav1 --enable-libx264 --enable-libx265 --enable-libvpx --enable-libxvid --enable-libvidstab --enable-libaom --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libtheora --enable-libfdk-aac --enable-libwebp --enable-libsrt --disable-debug --disable-doc --disable-shared --enable-pthreads --enable-static --enable-small --enable-version3 --enable-libfreetype --enable-libfontconfig --enable-decklink --extra-cflags='-I/Users/bouke/ffmpeg-build-script/workspace/include -I/Users/bouke/ffmpeg-build-script/include' --extra-ldexeflags= --extra-ldflags='-L/Users/bouke/ffmpeg-build-script/workspace/lib -L/Users/bouke/ffmpeg-build-script/include' --extra-libs='-ldl -lpthread -lm -lz' --pkgconfigdir=/Users/bouke/ffmpeg-build-script/workspace/lib/pkgconfig --pkg-config-flags=--static --prefix=/Users/bouke/ffmpeg-build-script/workspace libavutil 56. 63.101 / 56. 63.101 libavcodec 58.117.101 / 58.117.101 libavformat 58. 65.101 / 58. 65.101 libavdevice 58. 11.103 / 58. 11.103 libavfilter 7. 96.100 / 7. 96.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [decklink @ 0x7fc41a808200] Found Decklink mode 1920 x 1080 with rate 25.00(i) [decklink @ 0x7fc41a808200] Frame received (#1) - No input signal detected - Frames dropped 1 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, decklink, from 'bm mini One': Duration: N/A, start: 0.000000, bitrate: 830976 kb/s Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream #0:1: Video: rawvideo (UYVY / 0x59565955), uyvy422(top first), 1920x1080, 829440 kb/s, 25 tbr, 1000k tbn, 1000k tbc Stream mapping: Stream #0:1 (rawvideo) -> settb setpts -> Stream #0:0 (prores) split:output1 -> Stream #1:0 (rawvideo) Press [q] to stop, [?] for help Output #0, mov, to '/Volumes/Data/tst1.mov': Metadata: timecode : 00:01:00:00 encoder : Lavf58.65.101 Stream #0:0: Video: prores (apcs / 0x73637061), yuv422p10le(tv, top coded first (swapped)), 1920x1080, q=2-31, 200 kb/s, 0.04 fps, 12800 tbn Metadata: encoder : Lavc58.117.101 prores Output #1, mkvtimestamp_v2, to '/Volumes/Data/time.txt': Metadata: encoder : Lavf58.65.101 Stream #1:0: Video: rawvideo (Y42B / 0x42323459), yuv422p(tv, top coded first (swapped)), 1920x1080, q=2-31, 829440 kb/s, 25 fps, 1k tbn Metadata: encoder : Lavc58.117.101 rawvideo frame= 1 fps=0.0 q=0.0 q=-0.0 size= 0kB time=33848:30:24.72 bitrate= [decklink @ 0x7fc41a808200] Frame received (#8) - Input returned - Frames dropped 2 frame= 9 fps=0.0 q=-0.0 q=-0.0 size= 2304kB time=33848:30:25.24 bitrate= frame= 22 fps= 21 q=-0.0 q=-0.0 size= 7424kB time=33848:30:25.76 bitrate= frame= 35 fps= 22 q=-0.0 q=-0.0 size= 12800kB time=33848:30:26.28 bitrate= frame= 48 fps= 23 q=-0.0 q=-0.0 size= 17920kB time=33848:30:26.80 bitrate= frame= 61 fps= 23 q=-0.0 q=-0.0 size= 23296kB time=33848:30:27.32 bitrate= frame= 71 fps= 23 q=-0.0 Lq=-0.0 size= 28128kB time=33848:30:27.72 bitrate= 0.0kbits/s speed=3.99e+07x video:315677kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

1 0

Position of Images and Audio in a Video File
by Mettavihari D 24 May '21

24 May '21

Greetings, I have wondered how the Images and the Audio is placed in a Video File We speak of them as Tracks but I am trying to learn how it is placed binarily one after the other. It is after all just a binary list of numbers or codes. I download files which are in dash format from Youtube using youtube-dl. And it appears that the Video is separately downloaded and Audio separately After that the 2 files are merged together into one file. I would much appreciate having a pointer in the directions where I could read more about this. Regards Mettavihari [download] Wi-Fi World Congress Europe Day 1-551888518.fdash-fastly_skyfire_sep-video-59b7287b.mp4 has already been downloaded [download] 100% of 884.25MiB [dashsegments] Total fragments: 1906 [download] Destination: Wi-Fi World Congress Europe Day 1-551888518.fdash-fastly_skyfire_sep-audio-0c5aa284.m4a [download] 100% of 351.41MiB in 28:00 [ffmpeg] Merging formats into "Wi-Fi World Congress Europe Day 1-551888518.mp4" Deleting original file Wi-Fi World Congress Europe Day 1-551888518.fdash-fastly_skyfire_sep-video-59b7287b.mp4 (pass -k to keep) Deleting original file Wi-Fi World Congress Europe Day 1-551888518.fdash-fastly_skyfire_sep-audio-0c5aa284.m4a (pass -k to keep) -- Streaming video from http://learntv.lk

2 2

Video Freezing Sometimes, and not other times.
by Craig L. 21 May '21

21 May '21

I am running into an issue where I will encode a video and the primary video (in the command below it is the one called test-video.mp4) will at some point freeze frame while the other streams continue to encode and then play back correctly. The problem is that I haven't been able to recreate the issue yet because the people that experience it, re-convert the video and on the second try it pretty much always comes out correctly and at this point, I don't want to wait until I see it again to see if someone might have a clue of what to look for. Here is a glossary of what the inputs are: testcanvas.txt is a background image looped with the duration of 137.550 test-textfile.txt is a concat of images that are overlayed. test-video-two.mov is an overlaid video that does not freeze and goes all the way to the end. test-video.mp4 is the primary video, the one that is freezing. I have an auto-delete script running and I thought that /maybe/ in the middle of the encode, the video in question was accidentally being deleted causing the freeze frame, but I have tested this and it doesn't seem to be the case, but I haven't fully ruled it out. *COMMAND* /usr/local/bin/ffmpeg -safe 0 -f concat -i testcanvas.txt -safe 0 -f concat -i test-textfile.txt -i test-video.mp4 -i test-video-two.mov -filter_complex_script test-complex-filter.txt -aspect 1:1 -c:v libx264 -profile:v high -pix_fmt yuv420p -level 5.1 -vsync 1 -async 1 -c:a aac -b:a 128k -map 2:a -r 30 -t 137.550 -y test-output7.mp4 Here is the filter used from the complex_filter_script: [2:v]trim=start=0:end=137.550,setpts=PTS-STARTPTS,format=yuv420p[101v];[2:a]atrim=start=0:end=137.550,asetpts=PTS-STARTPTS[101a];[101v][101a]concat=n=1:v=1:a=1[2];[2]scale=1280:-2[2v];[0][2v]overlay=0:280[2v];[2v][1]overlay=0:0[v];[0:v]scale=1280:-2[f];[f][v]overlay=0:0[b];[3]scale=1280:-2[3v];[b][3v]overlay=0:280.00002 So, since I unfortunately don't have an actual example where this happened, is there anything in my command that might cause this intermittent behavior? Here is the output, but again, this time it turned out fine without the test-video.mp4 freeze-framing about 6 seconds before the end of the total video, but maybe this will help? /usr/local/bin/ffmpeg -safe 0 -f concat -i testcanvas.txt -safe 0 -f concat -i test-textfile.txt -i test-video.mp4 -i test-video-two.mov -filter_complex_script test-complex-filter.txt -aspect 1:1 -c:v libx264 -profile:v high -pix_fmt yuv420p -level 5.1 -vsync 1 -async 1 -c:a aac -b:a 128k -map 2:a -t 137.550 -r 30 -t 137.550 -y test-output7.mp4 ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100 Input #0, concat, from 'testcanvas.txt': Duration: 00:02:17.55, start: 0.000000, bitrate: 0 kb/s Stream #0:0: Video: targa, gray, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #1, concat, from 'test-textfile.txt': Duration: 00:02:17.45, start: 0.000000, bitrate: 0 kb/s Stream #1:0: Video: targa, bgra, 1280x1280, 25 tbr, 25 tbn, 25 tbc Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'test-video.mp4': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 creation_time : 2021-05-05T19:42:20.000000Z Duration: 00:02:17.55, start: 0.000000, bitrate: 836 kb/s Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 704 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default) Metadata: creation_time : 2021-05-05T19:42:20.000000Z handler_name : ISO Media file produced by Google Inc. Created on: 05/05/2021. Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default) Metadata: creation_time : 2021-05-05T19:42:20.000000Z handler_name : ISO Media file produced by Google Inc. Created on: 05/05/2021. Input #3, mov,mp4,m4a,3gp,3g2,mj2, from 'test-video-two.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf58.45.100 Duration: 00:02:17.56, start: 0.000000, bitrate: 53 kb/s Stream #3:0: Video: png (png / 0x20676E70), rgba(pc, progressive), 1280x14, 52 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default) Metadata: handler_name : VideoHandler encoder : Lavc58.91.100 png Stream mapping: Stream #0:0 (targa) -> overlay:main Stream #0:0 (targa) -> scale Stream #1:0 (targa) -> overlay:overlay Stream #2:0 (h264) -> trim Stream #2:1 (aac) -> atrim Stream #3:0 (png) -> scale concat:out:a0 -> Stream #0:0 (aac) overlay -> Stream #0:1 (libx264) Press [q] to stop, [?] for help -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0. [libx264 @ 0x7352900] using SAR=1/1 [libx264 @ 0x7352900] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512 [libx264 @ 0x7352900] profile High, level 5.1, 4:2:0, 8-bit [libx264 @ 0x7352900] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=40 lookahead_threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'test-output7.mp4': Metadata: encoder : Lavf58.45.100 Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default) Metadata: encoder : Lavc58.91.100 aac Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x1280 [SAR 1:1 DAR 1:1], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default) Metadata: encoder : Lavc58.91.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 4127 fps= 89 q=-1.0 Lsize= 15749kB time=00:02:17.55 bitrate= 937.9kbits/s dup=1 drop=0 speed=2.97x video:13439kB audio:2163kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.942718% [aac @ 0x7496900] Qavg: 445.198 [libx264 @ 0x7352900] frame I:17 Avg QP:16.54 size: 64367 [libx264 @ 0x7352900] frame P:1108 Avg QP:19.51 size: 7111 [libx264 @ 0x7352900] frame B:3002 Avg QP:20.76 size: 1595 [libx264 @ 0x7352900] consecutive B-frames: 0.4% 7.2% 1.9% 90.5% [libx264 @ 0x7352900] mb I I16..4: 33.2% 48.3% 18.5% [libx264 @ 0x7352900] mb P I16..4: 2.1% 2.8% 0.1% P16..4: 16.2% 5.9% 2.5% 0.0% 0.0% skip:70.4% [libx264 @ 0x7352900] mb B I16..4: 0.1% 0.1% 0.0% B16..8: 13.9% 1.0% 0.0% direct: 0.3% skip:84.6% L0:45.2% L1:53.7% BI: 1.0% [libx264 @ 0x7352900] 8x8 transform intra:53.7% inter:91.8% [libx264 @ 0x7352900] coded y,uvDC,uvAC intra: 23.2% 55.9% 9.6% inter: 2.0% 4.0% 0.0% [libx264 @ 0x7352900] i16 v,h,dc,p: 47% 22% 8% 24% [libx264 @ 0x7352900] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 23% 34% 2% 3% 2% 3% 2% 2% [libx264 @ 0x7352900] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 42% 29% 12% 2% 4% 4% 3% 3% 2% [libx264 @ 0x7352900] i8c dc,h,v,p: 55% 15% 26% 4% [libx264 @ 0x7352900] Weighted P-Frames: Y:0.0% UV:0.0% [libx264 @ 0x7352900] ref P L0: 63.7% 6.0% 21.7% 8.6% [libx264 @ 0x7352900] ref B L0: 79.6% 15.7% 4.7% [libx264 @ 0x7352900] ref B L1: 94.2% 5.8% [libx264 @ 0x7352900] kb/s:800.25

2 2

Modify FFMP Vendor FourCC for ProRes Videostream
by Marcel Hinsch 19 May '21

19 May '21

Hello, Looking into FFMPEG's source when trying to figure out how to change a ProRes Video Stream's vendor tag (which is required for certain automated spec compliency tests), I have found that the vendor code is hard-coded to "FFMP" as visible on this line of code: https://github.com/FFmpeg/FFmpeg/blob/c75dfa043585db7f5e20f5cab2ca8be1771ca… . Being hardcoded, it doesn't seem like it can be changed unless the source is forked. Is there a reason this is set to "FFMP"? Would there be an issue changing it to "appl"? Why was a different value from "appl" chosen in the first place? Sincerely, Marcel

2 1

ffmpeg srt to udp
by Javier Fuentes 19 May '21

19 May '21

Good evening I need to republish a srt stream unencoded (without a codification) c to udp stream, the srt 1.12 and last ffmpeg version has been compiled on centos 7. ffmpeg - version ffmpeg version N-101452-ga7425f7 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-36) My pipe line ffmpeg -i "srt://xx.xx.xx.xx:9002?mode=listener" -map 0 -codec copy -tune zerolatency -f mpegts udp://xx.xx.xx.xx:9000?pkt_size=1316 The output is full of artifacts and is cut off after a few seconds, the bit decreases to 0 and is lost, but the ffmpeg keeps sending. Thanks in advance for your help KIng regard -- Javier Fuentes Flumotion Services S.A. Avda. Diagonal 593-595 5º 08014 Barcelona - Spain www.flumotion.com *AVISO LEGAL:* Todo el contenido de este correo y sus adjuntos proviene de FLUMOTION SERVICES, S.A. (en adelante, “FLUMOTION”). La información contenida en este e-mail es confidencial y está dirigida exclusivamente a su destinatario. Aunque FLUMOTION le remita cualquier clase de información o material, ello no podrá interpretarse como cesión, licencia o derecho a usar o comercializar tales materiales. Si usted no es el destinatario de este email, no está autorizado a usar o comunicar públicamente este mensaje y/o su contenido. Si ha recibido este mensaje por error, por favor elimínelo y contacte con nuestro personal en el teléfono +34 935086350. FLUMOTION es una sociedad anónima con domicilio social en Avenida Diagonal 593, 5º 08014 – Barcelona – España. Los datos personales que recibamos de nuestra correspondencia con Ud. se incorporan en un fichero de FLUMOTION cuya finalidad es la de gestionar la relación contractual con usted, así como remitirle comunicaciones sobre FLUMOTION, y su tratamiento está legitimado por la existencia de dicha relación y la necesidad de gestionarla. En el caso de comunicaciones de negocio y, si es o ha sido nuestro cliente, de comunicaciones de comerciales, la legitimación para el tratamiento será nuestro interés legítimo en desarrollar negocio. Vd. puede ejercitar sus derechos de acceso, rectificación, cancelación u oposición, así como el resto de derechos que le asisten según Ley, mediante escrito a info(a)flumotion.com o al domicilio social de FLUMOTION.

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Python / Qprocess misfires commands.
by Bouke 19 May '21

19 May '21

Using Python to fire FFmpeg cmd = ‘ffmpeg’ args = [‘-f’, ‘avfoundation’, ‘-i’, ‘:0’] with a QProcess, this returns exit code 6, exitstatus 1 ffmpeg -f avfoundation -i :0 in a Terminal works. (At least one output file….) Bouke

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