July 2020 - ffmpeg-user - lists.ffmpeg.org

Re: [FFmpeg-user] JPGs->video1 ; MOV -> Mp4 video2 ; Concatenate - video2 audio OK but video is slow . .
by Philip Rhoades 18 Mar '23

18 Mar '23

Carl, There has been some improvement - I will top-post for clarity but the slow motion video has disappeared and the only remaining problem is that the audio and video are out of sync: I stuck with concat because it alllows me to specify image files more conveniently in the concat_demuxer?.txt file: ffmpeg -f concat -i concat_demuxer1.txt -vf scale=1024:576 -r 30000/1001 output1.mp4 ffmpeg -f concat -i concat_demuxer2.txt -vf scale=1024:576 -r 30000/1001 output2.mp4 ffmpeg -f concat -i concat_demuxer3.txt -vf scale=1024:576 -r 30000/1001 output3.mp4 - see attached output. for i in 1 2 3 do ffmpeg -ar 44100 -acodec pcm_s16le -f s16le -ac 2 -i /dev/zero \ -i output${i}.mp4 \ -vcodec copy \ -acodec aac \ -shortest output${i}_silent.mp4 done - see attached output. #!/bin/sh ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy 2019-03-22_#1_XR_ClimateEmergencyDeclarationDayNSW_LoRes.mp4 - see attached output. On 2019-03-27 10:48, Carl Eugen Hoyos wrote: > 2019-03-27 0:23 GMT+01:00, Philip Rhoades <phil(a)pricom.com.au>: > >> On 2019-03-27 07:22, Carl Eugen Hoyos wrote: >>> 2019-03-26 21:15 GMT+01:00, Philip Rhoades <phil(a)pricom.com.au>: >>> >>>> I converted 21 JPGs to a video with: >>> >>> Usually, converting jpgs with the image2 input works better than >>> concat. >> >> Right - I will try that. > > This is probably not your issue but the concat demuxer > has the disadvantage that the console output is not > very helpful. > >>>> ffmpeg -f concat -i concat_demuxer1.txt -vf scale=1024:576 -r >>>> 29.97 >>> >>> This framerate is never correct, a possible frame rate is 30000/1001 >> >> Hmm . . I was just using what was reported for the frame for the MOVs >> . >> . so using: >> >> "-r 30000/1001" >> >> is OK? > > It is better if that is the framerate of the mov (as I assume). > >>> You can add the audio already in this step. >> >> I did have a few attempts at that but couldn't get it working so I >> resorted to a two-step process - I will have another look. >> >> >>>> output1.mp4 >>>> >>>> I then added a silent audio track with: >>>> >>>> ffmpeg -ar 44100 -acodec pcm_s16le -f s16le -ac 2 -channel_layout >>>> 2.1 >>> >>> The channel number and layout do not match. >> >> Should it be just "stereo"? > > Or drop channel_layout, for -ac 2 it should not be needed. > >>>> -i /dev/zero \ >>>> -i output${i}.mp4 \ >>>> -vcodec copy \ >>>> -acodec aac \ >>>> -shortest output${i}_silent.mp4 >>> >>>> I had another MOV file (fr=29.97) that I converted with: >>>> >>>> newfn=`basename $fn .MOV` >>>> ffmpeg -i $fn -vf scale=1024:576 ./${newfn}.mp4 >>>> >>>> When I concatenate them with (and other converted JPGs and MOVS on >>>> the >>>> end) using: >>>> >>>> ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy \ >>>> 2019-03-22_#1_XR_ClimateEmergencyDeclarationDayNSW_LoRes.mp4 >>>> >>>> the concat succeeds OK but when I play the video, the audio is OK >>>> but >>>> then when it gets to the converted MOV section, people are moving in >>>> slow motion . . >>>> >>>> Another odd thing, the first 21 converted JPGs at 4 sec each >>>> correctly >>>> shows 84 sec when viewed with mpv but when the converted MOV starts >>>> it >>>> jumps to ~3m 50s . . >>>> >>>> So there is at least one problem but maybe two? Can anyone tell me >>>> what >>>> I am missing? >>> >>> You may have to re-encode, feel free to provide the complete, uncut >>> console output. > > ..feel free to provide the complete, uncut console output for the > command line you already tried and also ffmpeg -i output for > the input files (as concat doesn't show it). > > Carl Eugen -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil(a)pricom.com.au

2 2

Recording audio from mic and speakers from commandline
by Mohan G 28 Sep '21

28 Sep '21

Hi, I am using ffmpeg version 2.4.7 on Fedora-21 workstation. I want to record audio, simultaneously from mic and speakers as separate streams. I am using the following command for it. ffmpeg -f alsa -i pulse -f alsa -i default -acodec libmp3lame -map 0:0 -map 1:0 outfile.mkv But after executing this command in terminal, I have to goto "Volume Control" settings in GUI, then goto "Recording" tab, change the "capture from" of one channel to "Built-in Audio Analog Stereo" (i.e., Mic) and the "capture from" of another channel to "Monitor of Built-in Audio Analog Stereo" (i.e., Speakers). But how can this be done completely from command-line, for automating it to use in scripts. - Mohan

3 10

libaom - first frame not lossless when > 7 frames in source
by Kieran O Leary 21 Mar '21

21 Mar '21

Hi, I was doing some tests with libaom and lossness encoding and with synthetic files and some real world files, I kept finding that the framemd5s for the first frame was different than the source, but every other libaom encoded frame produced matching framemd5s for source and output. I then tried with smaller frame counts, and with synthetic files, I found that all frames would produce matching framemd5s when there was between 1 and 7 frames in the input. Once you went to 8 frames and above, the first frame would produce a framemd5 mismatch. here's a bunch of commands using ffmpeg git-master and what I assume to be libaom git master, or whatever the Ubuntu ffmpeg compilation wiki is using: 0) framemd5 output of the 8fr source - note the first frame value 1) Make a 8frame v210 via testsrc 2) Turn into av1 with -crf 0 3) get framemd5 of av1 output - note that first framemd5 value is different 4-6 - same as 1 to 3 but with a 7 frame testsrc file Any idea what's happening? Will I get the libx264-style answer: 'this is googles issue, not ffmpeg'0b1ae3e77528dcdacfab21761076d2b0b1ae3e77528dcdacfab21761076d2b /ffmpeg -i 8fr.mkv -f framemd5 - ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 Input #0, matroska,webm, from '8fr.mkv': Metadata: ENCODER : Lavf58.44.100 Duration: 00:00:00.32, start: 0.000000, bitrate: 43031 kb/s Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc58.90.100 v210 DURATION : 00:00:00.320000000 Stream mapping: Stream #0:0 -> #0:0 (v210 (native) -> rawvideo (native)) Press [q] to stop, [?] for help #format: frame checksums #version: 2 #hash: MD5 #software: Lavf58.44.100 #tb 0: 1/25 #media_type 0: video #codec_id 0: rawvideo #dimensions 0: 320x240 #sar 0: 1/1 #stream#, dts, pts, duration, size, hash Output #0, framemd5, to 'pipe:': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: rawvideo (Y3[10][10] / 0xA0A3359), yuv422p10le, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 38400 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: DURATION : 00:00:00.320000000 encoder : Lavc58.90.100 rawvideo 0, 0, 0, 1, 307200, 50b1ae3e77528dcdacfab21761076d2b 0, 1, 1, 1, 307200, 8213a857506c099160fffb2f606f3590 0, 2, 2, 1, 307200, a5e0786c6d9d152c45e2d3a0122c8987 0, 3, 3, 1, 307200, fd93af578482e418d1378f6d9cd94f14 0, 4, 4, 1, 307200, abfca35c7aae65d1dcddee1ce370479f 0, 5, 5, 1, 307200, da151dbf22f7e818344d5efd0cbb6f09 0, 6, 6, 1, 307200, b87bdb747fbd80060f71585e7d2c6ac9 0, 7, 7, 1, 307200, af69163b6455654da3a37cf52cfc4525 frame= 8 fps=0.0 q=-0.0 Lsize= 1kB time=00:00:00.32 bitrate= 21.4kbits/s speed=33.1x video:2400kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown ./ffmpeg -f lavfi -i testsrc -c:v v210 -vframes 8 8fr.mkv ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 Input #0, lavfi, from 'testsrc': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> v210 (native)) Press [q] to stop, [?] for help Output #0, matroska, to '8fr.mkv': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 40960 kb/s, 25 fps, 1k tbn, 25 tbc Metadata: encoder : Lavc58.90.100 v210 frame= 8 fps=0.0 q=-0.0 Lsize= 1681kB time=00:00:00.28 bitrate=49003.7kbits/s speed=39.4x video:1680kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.054408% kieranjol@POWERVIRUS:~/ffmpeg_sources/ffmpeg$ ./ffmpeg -i 8fr.mkv -c:v av1 -crf 0 8fr_av1.mkv ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 Input #0, matroska,webm, from '8fr.mkv': Metadata: ENCODER : Lavf58.44.100 Duration: 00:00:00.32, start: 0.000000, bitrate: 43031 kb/s Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc58.90.100 v210 DURATION : 00:00:00.320000000 Stream mapping: Stream #0:0 -> #0:0 (v210 (native) -> av1 (libaom-av1)) Press [q] to stop, [?] for help [libaom-av1 @ 0x5620559e0600] v2.0.0 Output #0, matroska, to '8fr_av1.mkv': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: av1 (libaom-av1) (AV01 / 0x31305641), yuv422p10le, 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 1k tbn, 25 tbc (default) Metadata: DURATION : 00:00:00.320000000 encoder : Lavc58.90.100 libaom-av1 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 8 fps=3.7 q=0.0 Lsize= 29kB time=00:00:00.28 bitrate= 837.3kbits/s speed=0.129x video:28kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.188944% kieranjol@POWERVIRUS:~/ffmpeg_sources/ffmpeg$ ./ffmpeg -i 8fr_av1.mkv -f framemd5 - ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 [libaom-av1 @ 0x558d1646b740] v2.0.0 Input #0, matroska,webm, from '8fr_av1.mkv': Metadata: ENCODER : Lavf58.44.100 Duration: 00:00:00.32, start: 0.000000, bitrate: 735 kb/s Stream #0:0: Video: av1 (Professional), yuv422p10le(tv), 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc58.90.100 libaom-av1 DURATION : 00:00:00.320000000 [libaom-av1 @ 0x558d16479800] v2.0.0 Stream mapping: Stream #0:0 -> #0:0 (av1 (libaom-av1) -> rawvideo (native)) Press [q] to stop, [?] for help #format: frame checksums #version: 2 #hash: MD5 #software: Lavf58.44.100 #tb 0: 1/25 #media_type 0: video #codec_id 0: rawvideo #dimensions 0: 320x240 #sar 0: 1/1 #stream#, dts, pts, duration, size, hash Output #0, framemd5, to 'pipe:': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: rawvideo (Y3[10][10] / 0xA0A3359), yuv422p10le, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 38400 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: DURATION : 00:00:00.320000000 encoder : Lavc58.90.100 rawvideo 0, 0, 0, 1, 307200, e790aa300c6bdd6bad6770c6c6346585 0, 1, 1, 1, 307200, 8213a857506c099160fffb2f606f3590 0, 2, 2, 1, 307200, a5e0786c6d9d152c45e2d3a0122c8987 0, 3, 3, 1, 307200, fd93af578482e418d1378f6d9cd94f14 0, 4, 4, 1, 307200, abfca35c7aae65d1dcddee1ce370479f 0, 5, 5, 1, 307200, da151dbf22f7e818344d5efd0cbb6f09 0, 6, 6, 1, 307200, b87bdb747fbd80060f71585e7d2c6ac9 0, 7, 7, 1, 307200, af69163b6455654da3a37cf52cfc4525 frame= 8 fps=0.0 q=-0.0 Lsize= 1kB time=00:00:00.32 bitrate= 21.4kbits/s speed=15.7x video:2400kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown kieranjol@POWERVIRUS:~/ffmpeg_sources/ffmpeg$ ./ffmpeg -f lavfi -i testsrc -c:v v210 -vframes 7 7fr.mkv ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 Input #0, lavfi, from 'testsrc': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> v210 (native)) Press [q] to stop, [?] for help Output #0, matroska, to '7fr.mkv': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 40960 kb/s, 25 fps, 1k tbn, 25 tbc Metadata: encoder : Lavc58.90.100 v210 frame= 7 fps=0.0 q=-0.0 Lsize= 1471kB time=00:00:00.24 bitrate=49997.4kbits/s speed=37.6x video:1470kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.059258% kieranjol@POWERVIRUS:~/ffmpeg_sources/ffmpeg$ ./ffmpeg -i 7fr.mkv -c:v av1 -crf 0 7fr_av1.mkv ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 Input #0, matroska,webm, from '7fr.mkv': Metadata: ENCODER : Lavf58.44.100 Duration: 00:00:00.28, start: 0.000000, bitrate: 43033 kb/s Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le, 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc58.90.100 v210 DURATION : 00:00:00.280000000 Stream mapping: Stream #0:0 -> #0:0 (v210 (native) -> av1 (libaom-av1)) Press [q] to stop, [?] for help [libaom-av1 @ 0x5613e4bb0600] v2.0.0 Output #0, matroska, to '7fr_av1.mkv': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: av1 (libaom-av1) (AV01 / 0x31305641), yuv422p10le, 320x240 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 1k tbn, 25 tbc (default) Metadata: DURATION : 00:00:00.280000000 encoder : Lavc58.90.100 libaom-av1 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A frame= 7 fps=4.2 q=0.0 Lsize= 23kB time=00:00:00.24 bitrate= 793.4kbits/s speed=0.143x video:23kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.685054% kieranjol@POWERVIRUS:~/ffmpeg_sources/ffmpeg$ ./ffmpeg -i 7fr_av1.mkv -f framemd5 - ffmpeg version N-98060-g1c32d7d Copyright (c) 2000-2020 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-10ubuntu2) configuration: --prefix=/home/kieranjol/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/kieranjol/ffmpeg_build/include --extra-ldflags=-L/home/kieranjol/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/kieranjol/bin --enable-libaom libavutil 56. 50.100 / 56. 50.100 libavcodec 58. 90.100 / 58. 90.100 libavformat 58. 44.100 / 58. 44.100 libavdevice 58. 9.103 / 58. 9.103 libavfilter 7. 84.100 / 7. 84.100 libswscale 5. 6.101 / 5. 6.101 libswresample 3. 6.100 / 3. 6.100 [libaom-av1 @ 0x5632da787740] v2.0.0 Input #0, matroska,webm, from '7fr_av1.mkv': Metadata: ENCODER : Lavf58.44.100 Duration: 00:00:00.28, start: 0.000000, bitrate: 682 kb/s Stream #0:0: Video: av1 (Professional), yuv422p10le(tv), 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Metadata: ENCODER : Lavc58.90.100 libaom-av1 DURATION : 00:00:00.280000000 [libaom-av1 @ 0x5632da78cf00] v2.0.0 Stream mapping: Stream #0:0 -> #0:0 (av1 (libaom-av1) -> rawvideo (native)) Press [q] to stop, [?] for help #format: frame checksums #version: 2 #hash: MD5 #software: Lavf58.44.100 #tb 0: 1/25 #media_type 0: video #codec_id 0: rawvideo #dimensions 0: 320x240 #sar 0: 1/1 #stream#, dts, pts, duration, size, hash Output #0, framemd5, to 'pipe:': Metadata: encoder : Lavf58.44.100 Stream #0:0: Video: rawvideo (Y3[10][10] / 0xA0A3359), yuv422p10le, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 38400 kb/s, 25 fps, 25 tbn, 25 tbc (default) Metadata: DURATION : 00:00:00.280000000 encoder : Lavc58.90.100 rawvideo 0, 0, 0, 1, 307200, 50b1ae3e77528dcdacfab21761076d2b 0, 1, 1, 1, 307200, 8213a857506c099160fffb2f606f3590 0, 2, 2, 1, 307200, a5e0786c6d9d152c45e2d3a0122c8987 0, 3, 3, 1, 307200, fd93af578482e418d1378f6d9cd94f14 0, 4, 4, 1, 307200, abfca35c7aae65d1dcddee1ce370479f 0, 5, 5, 1, 307200, da151dbf22f7e818344d5efd0cbb6f09 0, 6, 6, 1, 307200, b87bdb747fbd80060f71585e7d2c6ac9 frame= 7 fps=0.0 q=-0.0 Lsize= 1kB time=00:00:00.28 bitrate= 22.1kbits/s speed=15.3x video:2100kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown0b1ae3e77528dcdacfab21761076d2b Best, Kieran O'Leary Irish Film Institute

3 9

Audio out of sync after many Non-monotonous DTS in output stream warning
by Yang Zhang 02 Feb '21

02 Feb '21

when I transcoding some live stream that comes from DVB, I got many warnings bellow and after a few hours, the audio out of sync. [tee @ 0x2998780] Non-monotonous DTS in output stream 0:0; previous: 27931, current: 27929; changing to 27932. This may result in incorrect timestamps in the output file. [tee @ 0x2998780] Non-monotonous DTS in output stream 0:0; previous: 27935, current: 27933; changing to 27936. This may result in incorrect timestamps in the output file. And here is the ffmpeg command we used. Any suggestions for how to solve the audio out of sync issue? ffmpeg -vsync passthrough -copytb 1 -hwaccel cuvid -hwaccel_device 3 -probesize 10000000 -analyzeduration 10000000 -c:v h264_cuvid -gpu 3 -deint adaptive -drop_second_field 1 -fifo_size 713924 -overrun_nonfatal 1 -buffer_size 67108864 -i udp://127.0.0.1:48210 -filter_complex [0:i:0xab]split=outputs=1[map:v:0] -map [map:v:0] -c:v:0 h264_nvenc -g 250 -flags:v +global_header+cgop -preset:v medium -profile:v:0 high -gpu 3 -b:v:0 3500k -maxrate:v:0 5000k -bufsize:v:0 10000k -map 0:i:0x92 -c:a:0 aac -ac 2 -ar 44100 -b:a:0 128k -metadata service_name="LA 1 HD" -metadata service_provider="Movisrta+" -max_muxing_queue_size 512 -f tee [select=\'v:0,a:0\':bsfs/v=dump_extra=freq=keyframe:f=hls:hls_time=5:hls_list_size=10:hls_flags=delete_segments:var_stream_map=\'v:0,a:0\':hls_segment_filename=cache/hls /2/playlist_%v_%d.ts]cache/hls/2/index.m3u8

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'showspectrumpic' filter: scaling of the frequency axis and fft windows size
by Wolfgang Hugemann 29 Sep '20

29 Sep '20

Today, I have been experimenting with the 'showspectrum' filter, mostly with 'showspectrumpic'. I think there is a bug in the log scaling of the frequency axis if (and only if) it doesn't start at zero: The ratios of the frequency axis' labelings is not constant, they grow with larger values. I had a quick look at the source code and gained the impression that the fft windows size is based on the height of video created (?). At least it cannot by specified in the filter options. Kind regards Wolfgang Hugemann

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newbie in trouble
by Dave Stevens 06 Sep '20

06 Sep '20

I have ~3k images of about 2.3 megs each, all jpgs. I want to make a video using them. I very seldom use ffmpeg so I always forget the settings. I found a command line on stackexchange that seemed as if it would do the job. Output is below. I perhaps naively thought that 3k input frames would produce the same number of output frames and then at 30fps playback I'd have 100 seconds of video. That would be fine. What I did was wait a really long time while ffmpeg displayed a frame count in excess of 10K, almost 20K and turned out a video clip of 112 megs. This doesn't seem reasonable. Can anyone who is able to interpret the output below make a suggestion? I only want a simple video. The max number of frames would be 16,000 - a day's worth at one every 5 seconds. I thought that many frames would make a 10 minute video which is okay. Ideas? Thanks, Dave --------------- ffmpeg run time output ------------------- dave@dave-900X1B ~/Documents/Smokecam/2days ofoutdoorcapturesDecember112016 $ ffmpeg -r 1/5 -start_number 2 -i /home/dave/Documents/Smokecam/2days\ ofoutdoorcapturesDecember112016/smokey%04d.jpg -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4 ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609 configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv WARNING: library configuration mismatch avcodec configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv --enable-version3 --disable-doc --disable-programs --disable-avdevice --disable-avfilter --disable-avformat --disable-avresample --disable-postproc --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libvo_aacenc --enable-libvo_amrwbenc libavutil 54. 31.100 / 54. 31.100 libavcodec 56. 60.100 / 56. 60.100 libavformat 56. 40.101 / 56. 40.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 40.101 / 5. 40.101 libavresample 2. 1. 0 / 2. 1. 0 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 2.101 / 1. 2.101 libpostproc 53. 3.100 / 53. 3.100 [mjpeg @ 0x198d800] Changeing bps to 8 Input #0, image2, from '/home/dave/Documents/Smokecam/2days ofoutdoorcapturesDecember112016/smokey%04d.jpg': Duration: 00:01:57.64, start: 0.000000, bitrate: N/A Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 2592x1944, 25 fps, 25 tbr, 25 tbn, 25 tbc File 'out.mp4' already exists. Overwrite ? [y/N] y [swscaler @ 0x199cb80] deprecated pixel format used, make sure you did set range correctly [libx264 @ 0x198f200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [libx264 @ 0x198f200] profile High, level 5.1 [libx264 @ 0x198f200] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=6 lookahead_threads=1 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 'out.mp4': Metadata: encoder : Lavf56.40.101 Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 2592x1944, q=-1--1, 30 fps, 15360 tbn, 30 tbc Metadata: encoder : Lavc56.60.100 libx264 Stream mapping: Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264)) Press [q] to stop, [?] for help frame=19351 fps=5.9 q=-1.0 Lsize= 110126kB time=00:10:44.96 bitrate=1398.8kbits/s dup=19221 drop=0 video:109896kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.208995% [libx264 @ 0x198f200] frame I:78 Avg QP:13.34 size:686665 [libx264 @ 0x198f200] frame P:4980 Avg QP:16.25 size: 11239 [libx264 @ 0x198f200] frame B:14293 Avg QP:22.23 size: 210 [libx264 @ 0x198f200] consecutive B-frames: 1.3% 0.5% 0.0% 98.1% [libx264 @ 0x198f200] mb I I16..4: 0.5% 83.0% 16.5% [libx264 @ 0x198f200] mb P I16..4: 0.0% 0.9% 0.0% P16..4: 3.9% 0.8% 0.5% 0.0% 0.0% skip:93.9% [libx264 @ 0x198f200] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.5% 0.0% 0.0% direct: 0.0% skip:99.5% L0:11.7% L1:88.3% BI: 0.0% [libx264 @ 0x198f200] 8x8 transform intra:87.5% inter:80.1% [libx264 @ 0x198f200] coded y,uvDC,uvAC intra: 98.3% 70.2% 53.3% inter: 0.5% 0.9% 0.0% [libx264 @ 0x198f200] i16 v,h,dc,p: 12% 15% 24% 49% [libx264 @ 0x198f200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 15% 30% 6% 8% 6% 7% 6% 9% [libx264 @ 0x198f200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 18% 9% 7% 11% 9% 10% 8% 10% [libx264 @ 0x198f200] i8c dc,h,v,p: 48% 31% 13% 8% [libx264 @ 0x198f200] Weighted P-Frames: Y:0.0% UV:0.0% [libx264 @ 0x198f200] ref P L0: 81.9% 7.5% 9.9% 0.6% 0.0% [libx264 @ 0x198f200] ref B L0: 71.5% 28.5% 0.1% [libx264 @ 0x198f200] ref B L1: 97.5% 2.5% [libx264 @ 0x198f200] kb/s:1395.68 Exiting normally, received signal 2. -- Affectionate tactile stimulation is a primary need, a need which must be satisfied if the infant is to develop as a healthy human being. And what is a healthy human being? One who is able to love, to work, to play, and to think critically and unprejudicially. -- Ashley Montagu – Touching, The human significance of the skin. 2e 1978 ettings

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Demuxing HLS stream of fmp4 segments
by Pedro Pedrosa 27 Aug '20

27 Aug '20

Hello all I'm trying to demux an HLS stream containing fmp4 segments. It works fine if I demux from the start of the input but as soon as I add the -ss flag to skip to a timecode it no longer produces any output. I have tested on my own ffmpeg-generated streams and also on a public file at https://bitmovin-a.akamaihd.net/content/MI201109210084_1/m3u8s-fmp4/f08e80d… Exact command that does not work: ffmpeg -ss 00:03:00 -i https://bitmovin-a.akamaihd.net/content/MI201109210084_1/m3u8s-fmp4/f08e80d… -y -frames 1 -f image2 test.jpg Usage that works (omit -ss): ffmpeg -i https://bitmovin-a.akamaihd.net/content/MI201109210084_1/m3u8s-fmp4/f08e80d… -y -frames 1 -f image2 test.jpg Any help would be greatly appreciated

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DELETE segments not working for HLS Push
by KRISHNAKUMAR N K 20 Aug '20

20 Aug '20

Hi Guys I am trying to push HLS chunks to an apache webdav server. The PUT/DELETE is working as expected when i use http, but DELETE is NOT working using *https, *however PUT works fine though HTTPS. I am getting the following error msg from the console. Let me know if I am missing something. *Error Log:* *[hls muxer @ 0x5268480] failed to delete old segment https://www@mail.com:test123@example.com:8043/hlstest/media_500k_004.ts <http://est123@example.com:8043/hlstest/media_500k_004.ts>: No such file or directory* *Console Logs:** https://pastebin.com/n4U2Jw76 <https://pastebin.com/n4U2Jw76>* *FFMPEG Command:* *ffmpeg -i "udp://230.1.1.2:11000?fifo_size=5000000&overrun_nonfatal=1 <http://230.1.1.2:11000?fifo_size=5000000&overrun_nonfatal=1>" -filter_complex [i:0x20c]yadif,setdar=640/360[v0] -f hls -map i:0x2e4 -af aresample=async=1:min_hard_comp=0.100000:first_pts=0 -c:a:0 libfdk_aac -b:a:0 64000 -ar:0 48000 -map [v0] -b:v:0 500000 -maxrate:v:0 500000 -minrate:v:0 500000 -bufsize:v:0 1000000 -s:v:0 640x360 -r:0 25 -sc_threshold 0 -pix_fmt yuv420p -flags +global_header+cgop -c:v:0 libx264 -profile:v:0 baseline -level:v:0 3.0 -preset:v:0 fast -nal-hrd cbr -g 50 -var_stream_map a:0,v:0,name:500k -master_pl_name master.m3u8 -hls_list_size 3 -hls_time 6 -hls_flags "delete_segments+independent_segments+discont_start" -hls_segment_filename https://www@mail.com:test123@example.com:8043/hlstest/media_%v_%03d.ts https://www@mail.com:test123@example.com:8043/hlstest/playlist_%v.m3u8* PS: I also did the same test with the latest ffmpeg from the git, but no luck. Regards *KrishnaKumar * *N K *

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How to have a secure UDP BroadCast
by hassan shatnawi 19 Aug '20

19 Aug '20

Dears, How to have a secure connection with username and password while broadcasting "UPD" I've use this command ffmpeg -f dshow -video_size 1280x720 -rtbufsize 702000K -framerate 30 -i video="Video (00-0 Pro Capture Quad HDMI)" -r 30 -threads 4 -vcodec libx264 -crf 0 -preset ultrafast -f mpegts "udp://username:password@192.168.1.12:6666" but it didn't work can you advice me plz. Thanks in advance. *Hassan Shatnawi* Software Developer *Software Development Department* *Haupshy Establishment for Electronics* Al Madina Al Monawara St. bld 31 | P.O.Box 6875 Amman 11118, Jordan. *T: *+962 6 5820 927* | F: *+962 6 5820 926* | M: *+962 78 5792 096 *E*: hassan(a)haupshy.com *|* www.haupshy.com

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timestamps
by 诸葛亮 31 Jul '20

31 Jul '20

Hello! I am a beginner. When I was reading your source code, I didn't quite understand the meaning of is_relative() and RELATIVE_TS_BASE. I would like to ask for your help. Thank you very much!

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