April 2015 - ffmpeg-user - lists.ffmpeg.org

HLS one liner from /dev/videoX
by Kai Hendry 30 Apr '15

30 Apr '15

Hi guys, I've received an answer on http://stackoverflow.com/a/29952909/4534 which doesn't work for me. I am simply trying to create a browser friendly stream in my LAN from my /dev/video1 device. Here is the report log: http://s.natalian.org/2015-04-30/ffmpeg-20150430-102645.log http://ix.io/icO is what I saw Here is the tarball of the output http://s.natalian.org/2015-04-30/output.tar.gz IIUC, `curl -s http://s.natalian.org/2015-04-30/output.tar.gz | tar zxvf -` and then `python -m http.server` gets everything setup on my desktop for playing back (last few seconds of?) the live recorded stream. Then accessing playlist.m3u8 on Safari "Mozilla/5.0 (iPhone; CPU iPhone OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12F70 Safari/600.1.4" will fail to dark grey screen. Before I make a bug report, am I missing something? I've tried -hls_flags live=1 & -segment_list_flags +live to no avail. Also I've noticed a discrepancy in the docs, I think! https://www.ffmpeg.org/ffmpeg-formats.html#Options-2 says the Default value of playlist entries is 5. Yet as you can see from my tarball there is about 22 .ts files after running it for just a minute or so. Sidenote: Would be great to have the MPEG-DASH version of command. https://www.ffmpeg.org/ffmpeg-formats.html#webm_005fdash_005fmanifest is not clear to me. Does Chrome playback from the manifest or these *.chk files? https://www.ffmpeg.org/ffmpeg-formats.html#Example-3 didn't work for me. http://s.natalian.org/2015-04-30/1430361818_1362x740.png Many thanks,

5 8

ffmpeg - avfoundation Audio stutters / sounds broken with screen capture [sample, config, output included]
by kevin 30 Apr '15

30 Apr '15

I am trying to do a basic screen capture in OS X [10.10.3] with audio from mic using avfoundation. The recorded audio is stuttering, breaks, or there is short bursts. This is the command I use [ffmpeg installed with brew, config and output below] ffmpeg -f avfoundation -i "1:0" -r 25 -c:v libx264 -preset fast -crf 22 -c:a libfdk_aac -b:a 128k -ar 44100 -s 640x480 screen.mp4 I tried different codec, bitrate, and audio is broken in all. Here is link to the recorded file in which audio is broken: play on web: https://www.dropbox.com/s/p7ej68mrhi2te8r/screen.mp4?dl=0 downloadable link: https://www.dropbox.com/s/p7ej68mrhi2te8r/screen.mp4?dl=1 However if I capture with FaceTime camera, the audio is great and works fine. Can you please suggest what I can do to fix the audio with screen capture. Thank you for a great library ffmpeg! Please let me know if I need to add any other info. Output of command: ffmpeg -f avfoundation -i "1:0" -r 25 -c:v libx264 -preset fast -crf 22 -c:a libfdk_aac -b:a 128k -ar 44100 -s 640x480 screen.mp4 ffmpeg version 2.6.1 Copyright (c) 2000-2015 the FFmpeg developers built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn) configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libfaac --enable-libass --enable-ffplay --enable-libfdk-aac --enable-openssl --enable-libopus --enable-libquvi --enable-libx265 --enable-nonfree --enable-vda libavutil 54. 20.100 / 54. 20.100 libavcodec 56. 26.100 / 56. 26.100 libavformat 56. 25.101 / 56. 25.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 11.102 / 5. 11.102 libavresample 2. 1. 0 / 2. 1. 0 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 [avfoundation @ 0x7f9b89001400] Selected pixel format (yuv420p) is not supported by the input device. [avfoundation @ 0x7f9b89001400] Supported pixel formats: [avfoundation @ 0x7f9b89001400] uyvy422 [avfoundation @ 0x7f9b89001400] yuyv422 [avfoundation @ 0x7f9b89001400] nv12 [avfoundation @ 0x7f9b89001400] 0rgb [avfoundation @ 0x7f9b89001400] bgr0 [avfoundation @ 0x7f9b89001400] Overriding selected pixel format to use uyvy422 instead. [avfoundation @ 0x7f9b89001400] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #0, avfoundation, from '1:0': Duration: N/A, start: 0.368389, bitrate: N/A Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1440x900, 1000k tbr, 1000k tbn, 1000k tbc Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s No pixel format specified, yuv422p for H.264 encoding chosen. Use -pix_fmt yuv420p for compatibility with outdated media players. [libx264 @ 0x7f9b89103200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64 [libx264 @ 0x7f9b89103200] profile High 4:2:2, level 3.0, 4:2:2 8-bit [libx264 @ 0x7f9b89103200] 264 - core 144 r2533 c8a773e - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 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=3 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 Output #0, mp4, to 'screen.mp4': Metadata: encoder : Lavf56.25.101 Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 640x480, q=-1--1, 25 fps, 12800 tbn, 25 tbc Metadata: encoder : Lavc56.26.100 libx264 Stream #0:1: Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 44100 Hz, stereo, s16, 128 kb/s Metadata: encoder : Lavc56.26.100 libfdk_aac Stream mapping: Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (pcm_f32le (native) -> aac (libfdk_aac)) Press [q] to stop, [?] for help frame= 255 fps= 25 q=-1.0 Lsize= 286kB time=00:00:10.19 bitrate= 229.8kbits/s dup=102 drop=0 video:137kB audio:136kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 4.737433% [libx264 @ 0x7f9b89103200] frame I:2 Avg QP:20.52 size: 46726 [libx264 @ 0x7f9b89103200] frame P:65 Avg QP:23.32 size: 640 [libx264 @ 0x7f9b89103200] frame B:188 Avg QP:31.27 size: 22 [libx264 @ 0x7f9b89103200] consecutive B-frames: 1.6% 0.0% 1.2% 97.3% [libx264 @ 0x7f9b89103200] mb I I16..4: 15.7% 48.2% 36.1% [libx264 @ 0x7f9b89103200] mb P I16..4: 0.0% 0.0% 0.4% P16..4: 0.8% 0.1% 0.0% 0.0% 0.0% skip:98.7% [libx264 @ 0x7f9b89103200] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.2% 0.0% 0.0% direct: 0.0% skip:99.8% L0:38.8% L1:61.2% BI: 0.0% [libx264 @ 0x7f9b89103200] 8x8 transform intra:43.0% inter:2.5% [libx264 @ 0x7f9b89103200] coded y,uvDC,uvAC intra: 37.2% 37.7% 33.9% inter: 0.0% 0.1% 0.0% [libx264 @ 0x7f9b89103200] i16 v,h,dc,p: 60% 40% 0% 0% [libx264 @ 0x7f9b89103200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 87% 8% 3% 0% 0% 0% 0% 0% 1% [libx264 @ 0x7f9b89103200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 39% 12% 3% 3% 3% 6% 3% 8% [libx264 @ 0x7f9b89103200] i8c dc,h,v,p: 74% 11% 14% 1% [libx264 @ 0x7f9b89103200] Weighted P-Frames: Y:0.0% UV:0.0% [libx264 @ 0x7f9b89103200] ref P L0: 73.8% 26.2% [libx264 @ 0x7f9b89103200] ref B L0: 95.1% 4.9% [libx264 @ 0x7f9b89103200] ref B L1: 95.1% 4.9% [libx264 @ 0x7f9b89103200] kb/s:109.18 live@MAC:~$ du -h screen.mp4 288K screen.mp4

6 23

Using expressions in "FADE" filter
by Shlomo Morosow 30 Apr '15

30 Apr '15

I need the ability to input mathematical values for setting the start time (st) on the "fade" filter, I've attempted to use an expression and this particular filter does not seem to work with expressions, nor simple math as "10*1". I've included here the input and output of two commands which I've run, the first with a number as the "st" value which ran successfully and the second with an expression as the "st" value which returned errors. Does anyone have any creative solutions? perhaps using the "blend" filter? Thanks very much Input 1: ffmpeg.exe -y -ss "0:00:20" -t "0:00:10" -i input.avi -filter_complex "fade=out:st=9:d=1" -f dvd -target ntsc-dvd -r 29.97 -aspect 4:3 -b:v 4500k -mbd rd -trellis 1 -flags +mv0 -cmp 0 -subcmp 2 -b:a 128k output.vob Output 1: ffmpeg version N-70875-g3c5c687 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib libavutil 54. 20.100 / 54. 20.100 libavcodec 56. 29.100 / 56. 29.100 libavformat 56. 26.101 / 56. 26.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 13.101 / 5. 13.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, avi, from 'input.avi': Duration: 00:00:42.54, start: 0.000000, bitrate: 30316 kb/s Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 28793 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2 channels, s16, 1536 kb/s Output #0, dvd, to 'output.vob': Metadata: encoder : Lavf56.26.101 Stream #0:0: Video: mpeg2video, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, 4500 kb/s, 29.97 fps, 90k tbn, 29.97 tbc Metadata: encoder : Lavc56.29.100 mpeg2video Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 128 kb/s Metadata: encoder : Lavc56.29.100 ac3 Stream mapping: Stream #0:0 (dvvideo) -> fade (graph 0) fade (graph 0) -> Stream #0:0 (mpeg2video) Stream #0:1 -> #0:1 (pcm_s16le (native) -> ac3 (native)) Press [q] to stop, [?] for help frame= 88 fps=0.0 q=5.3 size= 1736kB time=00:00:03.19 bitrate=4451.6kbits/s frame= 178 fps=177 q=2.6 size= 3332kB time=00:00:06.10 bitrate=4469.8kbits/s frame= 255 fps=169 q=2.0 size= 4378kB time=00:00:09.01 bitrate=3976.7kbits/s frame= 300 fps=180 q=1.6 Lsize= 4536kB time=00:00:10.01 bitrate=3711.9kbits/s video:4269kB audio:156kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.506122% Input 2: ffmpeg.exe -y -ss "0:00:20" -t "0:00:10" -i input.avi -filter_complex "fade=out:st=%{expr\\\: (10-1)}:d=1" -f dvd -target ntsc-dvd -r 29.97 -aspect 4:3 -b:v 4500k -mbd rd -trellis 1 -flags +mv0 -cmp 0 -subcmp 2 -b:a 128k output.vob Output 2: ffmpeg version N-70875-g3c5c687 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib libavutil 54. 20.100 / 54. 20.100 libavcodec 56. 29.100 / 56. 29.100 libavformat 56. 26.101 / 56. 26.101 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 13.101 / 5. 13.101 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Guessed Channel Layout for Input Stream #0.1 : stereo Input #0, avi, from 'input.avi': Duration: 00:00:42.54, start: 0.000000, bitrate: 30316 kb/s Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 28793 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 2 channels, s16, 1536 kb/s [fade @ 0000000002c80f60] Unable to parse option value "%{expr: (10-1)}" as duration Last message repeated 1 times [fade @ 0000000002c80f60] Error setting option st to value %{expr: (10-1)}. [Parsed_fade_0 @ 0000000002c6a540] Error applying options to the filter. [AVFilterGraph @ 000000000035a440] Error initializing filter 'fade' with args 'out:st=%{expr\: (10-1)}:d=1' Error configuring filters.

2 5

Making conditional statements with FFMPEG
by Chris Zecco 30 Apr '15

30 Apr '15

I was wondering if there was a way to create an IF-THEN statement using FFMPEG for files in a certain directory. For example, I am using FFMPEG to crunch down file sizes of videos to 50MB or lower. I would ideally like to do the following: For file sizes in excess of 200MB: Encode video bit rate at 1500k Encode audio bit rate at 128k For file sizes 100-100MB: Encode video bit rate at 1100k Encode audio bit rate at 128k For file sizes less than 100MB: Encode video bit rate at 555k Encode audio bit rate at 128k Is this possible? And yes, I have run tests on individual file to ensure there is no real perceptible quality loss when dropping the bit rates that low. Any help that you could give would be amazing, and greatly appreciated. Thanks! - Chris

4 5

How to generate IRT conform D10 MXFs (IMX50) with FFmpeg?
by Christoph Gerstbauer 30 Apr '15

30 Apr '15

Hello I am making tests with IMX50/MXF encodings with FFMBC and FFMPEG. (with 24bit audio and 16bit audio) The tests compare the final files with the IRT MXF Analyzer Pro tool to be shure to be IRT conform. (My commandline outputs are at the bottom of this mail) Both files (generated with ffmbc and ffmpeg) are working very well in editing tools but there is a little difference: The IMX50 generated by ffmbc has no errors/warnings at IRT MXF Analyzer (with 16bit audio). It is really perfect. In fact (with one exception) I NEVER had a clean "green" MXF by testing other probes from other encoding tools. Only the IRT probes itself are clean (of course). So ffmbc MXF is IRT conform when using the standard target preset "imx50". (it automatically uses 16bit audio) When I use 24bit audio encoding at ffmbc, I got this error from IRT MXF Analyzer: ERROR: "The Sound Essence Descriptor signals that the number if quantization bits is 24, which is higher than actually required (16) as detemined by parsing the essence." I tried the same with ffmpeg: When using 16bit audio, I got no audio error. But I get always this warning: WARNING: "Fill Item Key with a wrong RP210 (SMPTE Metadata Dictionary) version number of 0x01. The correct version number is 0x02" When using 24bit audio I get the same error like in ffmbc with 24bit audio: ERROR: "The Sound Essence Descriptor signals that the number if quantization bits is 24, which is higher than actually required (16) as detemined by parsing the essence." So, I could always prevent the audio WARNING by producing 16bit audio. But is there a problem in the MXF when producing 24bit? Sound works in editing tools. So I have 2 questions (because I want to use ffmpeg instead of ffmbc) 1.) Is there an syntax option in ffmpeg/ffmbc for 24bit audio encoding to prevent this ERROR: "The Sound Essence Descriptor signals that the number if quantization bits is 24, which is higher than actually required (16) as detemined by parsing the essence." 2.) Is there an syntax option in ffmpeg to prevent this warning? WARNING: "Fill Item Key with a wrong RP210 (SMPTE Metadata Dictionary) version number of 0x01. The correct version number is 0x02" Every hint would be very helpful, thank you! Best Regards Christoph USED SYNTAX: ------------------------------------------------------------- FFmbc (16bit audio): ffmbc -i I:\IMX_tests\IMX50_CARBON.avi -target imx50 I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf -loglevel debug FFmbc version 0.7-rc7 Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder: Lavf55.0.100 ISMP: 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0.0(und): Video: ffvhuff, yuv422p, 720x608p, PAR 152:135 DAR 4:3, 25.00 fps Stream #0.1(und): Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s File 'I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf' already exists. Overwrite ? [y/N] y [buffer @ 00000000018E07E0] w:720 h:608 pixfmt:yuv422p tb:1/1000000 sar:152/135 sws_param: Incompatible sample format 's32' for codec 'pcm_s16le', auto-selecting format 's16' Warning, QMAT_SHIFT is larger than 21, overflows possible Last message repeated 1 times Output #0, mxf_d10, to 'I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf': Metadata: encoder: FFmbc 0.7 Stream #0.0(und), 0, 1/25: Video: mpeg2video, yuv422p, 720x608i tff [PAR 152:135 DAR 4:3], tbc 1/25, cbr, 50000 kb/s, 25.00 fps Stream #0.1(und), 0, 1/48000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop, [?] for help [mxf_d10 @ 000000000037C9C0] package type:1 [mxf_d10 @ 000000000037C9C0] package type:2 [mxf_d10 @ 000000000037C9C0] edit units count 0 frame= 239 fps= 25 q=3.0 size= 72409kB time=00:00:09.52 bitrate=62307.8kbits/s eta=00:00:10.51 ------------------------------------------------------------- FFmbc (24bit audio): ffmbc -i I:\IMX_tests\IMX50_CARBON.avi -target imx50 -acodec pcm_s24le I:\IMX_tests\_FFMBC_PAL_IMX_24bit_2.mxf -loglevel debug FFmbc version 0.7-rc7 Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder: Lavf55.0.100 ISMP: 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0.0(und): Video: ffvhuff, yuv422p, 720x608p, PAR 152:135 DAR 4:3, 25.00 fps Stream #0.1(und): Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s [buffer @ 00000000002EFF60] w:720 h:608 pixfmt:yuv422p tb:1/1000000 sar:152/135 sws_param: Warning, QMAT_SHIFT is larger than 21, overflows possible Last message repeated 1 times Output #0, mxf_d10, to 'I:\IMX_tests\_FFMBC_PAL_IMX_24bit_2.mxf': Metadata: encoder: FFmbc 0.7 Stream #0.0(und), 0, 1/25: Video: mpeg2video, yuv422p, 720x608i tff [PAR 152:135 DAR 4:3], tbc 1/25, cbr, 50000 kb/s, 25.00 fps Stream #0.1(und), 0, 1/48000: Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop, [?] for help [mxf_d10 @ 00000000003BF460] package type:1 [mxf_d10 @ 00000000003BF460] package type:2 [mxf_d10 @ 00000000003BF460] edit units count 0 frame= 341 fps= 25 q=3.0 size= 103570kB time=00:00:13.60 bitrate=62385.4kbits/s eta=00:00:06.41 ------------------------------------------------------------- FFMPEG (24bit audio): ffmpegnew -i I:\IMX_tests\IMX50_CARBON.avi -map 0:v -map 0:a -c:v mpeg2video -r 25 -pix_fmt yuv422p -aspect 4:3 -minrate 50000k -maxrate 50000k -b:v 50000k -intra -flags +ildct+low_del ay -intra_vlc 1 -non_linear_quant 1 -ps 1 -qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 2000000 -rc_init_occupancy 2000000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s24le -ar 48000 -f mxf_d10 I:\IMX_tests \_FFMPEGNEW_PAL_IMX_24bit_2.mxf ffmpeg version N-71727-g46778ab Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena ble-decklink --enable-zlib libavutil 54. 23.101 / 54. 23.101 libavcodec 56. 35.101 / 56. 35.101 libavformat 56. 31.100 / 56. 31.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 14.100 / 5. 14.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder : Lavf55.0.100 timecode : 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0:0: Video: ffvhuff (FFVH / 0x48564646), yuv422p, 720x608, 111196 kb/s, SAR 152:135 DAR 4:3, 25 fps, 25 tbr, 25 tbn, 25 tbc Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s File 'I:\IMX_tests\_FFMPEGNEW_PAL_IMX_24bit_2.mxf' already exists. Overwrite ? [y/N] y Output #0, mxf_d10, to 'I:\IMX_tests\_FFMPEGNEW_PAL_IMX_24bit_2.mxf': Metadata: timecode : 00:00:00:00 encoder : Lavf56.31.100 Stream #0:0: Video: mpeg2video, yuv422p, 720x608 [SAR 152:135 DAR 4:3], q=1-3, 50000 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc56.35.101 mpeg2video Stream #0:1: Audio: pcm_s24le, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Metadata: encoder : Lavc56.35.101 pcm_s24le Stream mapping: Stream #0:0 -> #0:0 (ffvhuff (native) -> mpeg2video (native)) Stream #0:1 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native)) Press [q] to stop, [?] for help [mxf_d10 @ 00000000003bf240] the number of audio channels shall be 4 or 8 : the output will not comply to MXF D-10 specs, use -d10_channelcount to fix this frame= 500 fps=347 q=1.6 Lsize= 152756kB time=00:00:20.00 bitrate=62568.9kbits/s video:122070kB audio:5625kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 19.625412%

2 2

cutting iFrame only media
by Mohammadtorabi 30 Apr '15

30 Apr '15

Hi,I have created an iFrame only MXF file by the command below using FFmpeg:value of -ss and -t is base on nearest iFrame before the mark-in and after mark-out.[code]ffmpeg -ss 3020.58 -i "input file name.MXF" -t 20.5205 -threads 4 -pix_fmt yuv420p-flags +ildct+ilme -vcodec mpeg2video -top 1 -dc 10 -intra_vlc 1 -qmin 1 -lmin 1*QP2LAMBDA -vtag xd5c -g 0 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -b:v 35000k -bufsize 35000k -minrate 35000k -maxrate 35000k -aspect 16:9 -vf "scale=-1:1080" -r 29.97 -f mxf -y "iFrame Only output file name.MXF"[/code]the log of running command is below:[code]ffmpeg version N-71737-gb410c69 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib libavutil 54. 23.101 / 54. 23.101 libavcodec 56. 35.101 / 56. 35.101 libavformat 56. 31.100 / 56. 31.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 14.100 / 5. 14.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100Guessed Channel Layout for Input Stream #0.1 : stereoInput #0, mxf, from 'input file name.MXF': Metadata: uid : adab4424-2f25-4dc7-92ff-29bd000b0000 generation_uid : adab4424-2f25-4dc7-92ff-29bd000b0001 company_name : FFmpeg product_name : OP1a Muxer product_version : 54.63.104 product_uid : adab4424-2f25-4dc7-92ff-29bd000b0002 modification_date: 0000-01-01 00:00:00 material_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE000 timecode : 00:00:00;00 Duration: 01:00:00.03, start: 0.000000, bitrate: 4592 kb/s Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, unknown/bt709/bt709), 1920x1080 [SAR 1:1 DAR 16:9], max. 35000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc Metadata: file_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE001 Stream #0:1: Audio: pcm_s24le, 48000 Hz, 2 channels, s32 (24 bit), 2304 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE001[mpeg2video @ 0000000004edd140] Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate!Output #0, mxf, to 'iFrame Only output file name.MXF': Metadata: uid : adab4424-2f25-4dc7-92ff-29bd000b0000 generation_uid : adab4424-2f25-4dc7-92ff-29bd000b0001 company_name : FFmpeg product_name : OP1a Muxer product_version : 54.63.104 product_uid : adab4424-2f25-4dc7-92ff-29bd000b0002 modification_date: 0000-01-01 00:00:00 material_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE000 timecode : 00:00:00;00 encoder : Lavf56.31.100 Stream #0:0: Video: mpeg2video (xd5c / 0x63356478), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=1-31, 35000 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc Metadata: file_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE001 encoder : Lavc56.35.101 mpeg2video Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16 (24 bit), 1536 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D0013E00EE4529471344CE00EE400529471344CE001 encoder : Lavc56.35.101 pcm_s16leStream mapping: Stream #0:0 -> #0:0 (mpeg2video (native) -> mpeg2video (native)) Stream #0:1 -> #0:1 (pcm_s24le (native) -> pcm_s16le (native))Press [q] to stop, [?] for help[mxf @ 0000000002d98440] -d10_channelcount requires MXF D-10 and will be ignoredframe= 615 fps=313 q=0.8 Lsize= 91196kB time=00:00:20.52 bitrate=36406.4kbits/svideo:86605kB audio:3848kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.822079%[/code]then used the iFrame only file as input file and the command below to cut a chunk of it.[code]ffmpeg -ss 0.2002 -i "iFrame Only output file name.MXF" -c:v copy -t [b]19.9533[/b] -an -f MXF -y "iFrame Only Video_1.MXF"[/code]the log of the command is:[code]ffmpeg version N-71737-gb410c69 Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib libavutil 54. 23.101 / 54. 23.101 libavcodec 56. 35.101 / 56. 35.101 libavformat 56. 31.100 / 56. 31.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 14.100 / 5. 14.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100Guessed Channel Layout for Input Stream #0.1 : stereoInput #0, mxf, from 'iFrame Only output file name.MXF': Metadata: uid : adab4424-2f25-4dc7-92ff-29bd000c0000 generation_uid : adab4424-2f25-4dc7-92ff-29bd000c0001 company_name : FFmpeg product_name : OP1a Muxer product_version : 56.31.100 product_uid : adab4424-2f25-4dc7-92ff-29bd000c0002 modification_date: 0000-01-01 00:00:00 material_package_umid: 0x060A2B340101010501010D001346374B529471349946374B0052947134994600 timecode : 00:00:00;00 Duration: 00:00:20.52, start: 0.000000, bitrate: 36406 kb/s Stream #0:0: Video: mpeg2video (Main), yuv420p(tv), 1920x1080 [SAR 1:1 DAR 16:9], max. 35000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc Metadata: file_package_umid: 0x060A2B340101010501010D001346374B529471349946374B0052947134994601 Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Metadata: file_package_umid: 0x060A2B340101010501010D001346374B529471349946374B0052947134994601Output #0, mxf, to 'iFrame Only Video_1.MXF': Metadata: uid : adab4424-2f25-4dc7-92ff-29bd000c0000 generation_uid : adab4424-2f25-4dc7-92ff-29bd000c0001 company_name : FFmpeg product_name : OP1a Muxer product_version : 56.31.100 product_uid : adab4424-2f25-4dc7-92ff-29bd000c0002 modification_date: 0000-01-01 00:00:00 material_package_umid: 0x060A2B340101010501010D001346374B529471349946374B0052947134994600 timecode : 00:00:00;00 encoder : Lavf56.31.100 Stream #0:0: Video: mpeg2video, yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, max. 35000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc Metadata: file_package_umid: 0x060A2B340101010501010D001346374B529471349946374B0052947134994601Stream mapping: Stream #0:0 -> #0:0 (copy)Press [q] to stop, [?] for helpframe= 600 fps=0.0 q=-1.0 Lsize= 85564kB [b]time=00:00:19.98[/b] bitrate=35070.5kbits/svideo:84986kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.679815%[/code]as you can compare the command and log, value of -t in command is 19.9533 and time in log is 19.98. (the log shows that the output is one Frame longer). but when I check the specs of output by MediaInfo it show that the duration is 20.020 (two frames longer than the command).any comments or suggestion on why it happens?thanks -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/cutting-iFrame-only-media-tp467011… Sent from the FFmpeg-users mailing list archive at Nabble.com.

2 1

How to generate IRT conform D10 IMX50 MXFs (and how to set the output color_range, -space, -transfer and primaries flags)
by Christoph Gerstbauer 30 Apr '15

30 Apr '15

Hello I am making tests with IMX50/MXF encodings with FFMBC and FFMPEG. (with 24bit audio) The tests compare the final files with the IRT MXF Analyzer Pro tool to be shure to be IRT conform. (My used syntax is at the bottom of this mail) Both files (generated with ffmbc and ffmpeg) are working very well in editing tools but there is a little difference: The IMX50 generated by ffmbc has no errors/warnings at IRT MXF Analyzer (with16bit audio). It is really perfect. In fact I never had a clean "green" MXF by testing other probes from other encoding tools. Only the IRT probes itself are clean. So this MXF is IRT conform when using the ffmbc standard target preset "imx50". The Analyzis of the IMX50/MXF generated by FFMPEG (latest build from zeganoe) has 1 warning and 1 error: WARNING: "Fill Item Key with a wrong RP210 (SMPTE Metadata Dictionary) version number of 0x01. The correct version number is 0x02" ERROR: "The Sound Essence Descriptor signals that the number if quantization bits is 24, which is higher than actually required (16) as detemined by parsing the essence." Due to the fact that I am producing 24bit audio I could prevent the WARNING by producing 16bit audio. But is there a problem in the MXF when producing 24bit? Sound works in editing tools. Furthermore ffmbc produces for standard a IMX with 16bit -> If I force ffmbc to do 24bit, I get the same error. Due to the warning: I found out that both files are different regarding these values (by reading out via ffprobe - show_streams) FFMBC IMX FILE stream 0:0: color_range=tv color_space=smpte170m color_transfer=bt709 color_primaries=bt470bg FFMPEG IMX FILE stream 0:0: color_range=tv color_space=unknown color_transfer=unknown color_primaries=unknown So my questions are : 1.) How can I produce (with ffmpeg) the same output like ffmbc with these 4 metadata flags: color_range=tv color_space=smpte170m color_transfer=bt709 color_primaries=bt470bg I didnt found a answer to that in the ffmpeg documentation :/ 2.) Maybe somebody knows: Do these 4 metadata flags have a connection to the Warning message of the MXF Analyzer? -> "Fill Item Key with a wrong RP210 (SMPTE Metadata Dictionary) version number of 0x01. The correct version number is 0x02" If nobody know this answer I could do the test for myself by be able to encode with the upper params in 1.). 3.) Is there an syntax option in ffmpeg for 24bit audio encoding to prevent this ERROR: "The Sound Essence Descriptor signals that the number if quantization bits is 24, which is higher than actually required (16) as detemined by parsing the essence." Best Regards Christoph USED SYNTAX: ------------------------------------------------------------- FFmbc (16bit audio): ffmbc -i I:\IMX_tests\IMX50_CARBON.avi -target imx50 I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf -loglevel debug FFmbc version 0.7-rc7 Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder: Lavf55.0.100 ISMP: 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0.0(und): Video: ffvhuff, yuv422p, 720x608p, PAR 152:135 DAR 4:3, 25.00 fps Stream #0.1(und): Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s File 'I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf' already exists. Overwrite ? [y/N] y [buffer @ 00000000018E07E0] w:720 h:608 pixfmt:yuv422p tb:1/1000000 sar:152/135 sws_param: Incompatible sample format 's32' for codec 'pcm_s16le', auto-selecting format 's16' Warning, QMAT_SHIFT is larger than 21, overflows possible Last message repeated 1 times Output #0, mxf_d10, to 'I:\IMX_tests\_FFMBC_PAL_IMX_16bit_2.mxf': Metadata: encoder: FFmbc 0.7 Stream #0.0(und), 0, 1/25: Video: mpeg2video, yuv422p, 720x608i tff [PAR 152:135 DAR 4:3], tbc 1/25, cbr, 50000 kb/s, 25.00 fps Stream #0.1(und), 0, 1/48000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop, [?] for help [mxf_d10 @ 000000000037C9C0] package type:1 [mxf_d10 @ 000000000037C9C0] package type:2 [mxf_d10 @ 000000000037C9C0] edit units count 0 frame= 239 fps= 25 q=3.0 size= 72409kB time=00:00:09.52 bitrate=62307.8kbits/s eta=00:00:10.51 ------------------------------------------------------------- FFmbc (24bit audio): ffmbc -i I:\IMX_tests\IMX50_CARBON.avi -target imx50 -acodec pcm_s24le I:\IMX_tests\_FFMBC_PAL_IMX_24bit_2.mxf -loglevel debug FFmbc version 0.7-rc7 Copyright (c) 2008-2012 Baptiste Coudurier and the FFmpeg developers Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder: Lavf55.0.100 ISMP: 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0.0(und): Video: ffvhuff, yuv422p, 720x608p, PAR 152:135 DAR 4:3, 25.00 fps Stream #0.1(und): Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s [buffer @ 00000000002EFF60] w:720 h:608 pixfmt:yuv422p tb:1/1000000 sar:152/135 sws_param: Warning, QMAT_SHIFT is larger than 21, overflows possible Last message repeated 1 times Output #0, mxf_d10, to 'I:\IMX_tests\_FFMBC_PAL_IMX_24bit_2.mxf': Metadata: encoder: FFmbc 0.7 Stream #0.0(und), 0, 1/25: Video: mpeg2video, yuv422p, 720x608i tff [PAR 152:135 DAR 4:3], tbc 1/25, cbr, 50000 kb/s, 25.00 fps Stream #0.1(und), 0, 1/48000: Audio: pcm_s24le, 48000 Hz, stereo, s32, 2304 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop, [?] for help [mxf_d10 @ 00000000003BF460] package type:1 [mxf_d10 @ 00000000003BF460] package type:2 [mxf_d10 @ 00000000003BF460] edit units count 0 frame= 341 fps= 25 q=3.0 size= 103570kB time=00:00:13.60 bitrate=62385.4kbits/s eta=00:00:06.41 ------------------------------------------------------------- FFMPEG (24bit audio): ffmpegnew -i I:\IMX_tests\IMX50_CARBON.avi -map 0:v -map 0:a -c:v mpeg2video -r 25 -pix_fmt yuv422p -aspect 4:3 -minrate 50000k -maxrate 50000k -b:v 50000k -intra -flags +ildct+low_del ay -intra_vlc 1 -non_linear_quant 1 -ps 1 -qmin 1 -qmax 3 -top 1 -dc 10 -bufsize 2000000 -rc_init_occupancy 2000000 -rc_max_vbv_use 1 -rc_min_vbv_use 1 -c:a pcm_s24le -ar 48000 -f mxf_d10 I:\IMX_tests \_FFMPEGNEW_PAL_IMX_24bit_2.mxf ffmpeg version N-71727-g46778ab Copyright (c) 2000-2015 the FFmpeg developers built with gcc 4.9.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libblu ray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enab le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --ena ble-decklink --enable-zlib libavutil 54. 23.101 / 54. 23.101 libavcodec 56. 35.101 / 56. 35.101 libavformat 56. 31.100 / 56. 31.100 libavdevice 56. 4.100 / 56. 4.100 libavfilter 5. 14.100 / 5. 14.100 libswscale 3. 1.101 / 3. 1.101 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100 Input #0, avi, from 'I:\IMX_tests\IMX50_CARBON.avi': Metadata: encoder : Lavf55.0.100 timecode : 00:00:00:00 Duration: 00:00:20.00, start: 0.000000, bitrate: 113291 kb/s Stream #0:0: Video: ffvhuff (FFVH / 0x48564646), yuv422p, 720x608, 111196 kb/s, SAR 152:135 DAR 4:3, 25 fps, 25 tbr, 25 tbn, 25 tbc Stream #0:1: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s File 'I:\IMX_tests\_FFMPEGNEW_PAL_IMX_24bit_2.mxf' already exists. Overwrite ? [y/N] y Output #0, mxf_d10, to 'I:\IMX_tests\_FFMPEGNEW_PAL_IMX_24bit_2.mxf': Metadata: timecode : 00:00:00:00 encoder : Lavf56.31.100 Stream #0:0: Video: mpeg2video, yuv422p, 720x608 [SAR 152:135 DAR 4:3], q=1-3, 50000 kb/s, 25 fps, 25 tbn, 25 tbc Metadata: encoder : Lavc56.35.101 mpeg2video Stream #0:1: Audio: pcm_s24le, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s Metadata: encoder : Lavc56.35.101 pcm_s24le Stream mapping: Stream #0:0 -> #0:0 (ffvhuff (native) -> mpeg2video (native)) Stream #0:1 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native)) Press [q] to stop, [?] for help [mxf_d10 @ 00000000003bf240] the number of audio channels shall be 4 or 8 : the output will not comply to MXF D-10 specs, use -d10_channelcount to fix this frame= 500 fps=347 q=1.6 Lsize= 152756kB time=00:00:20.00 bitrate=62568.9kbits/s video:122070kB audio:5625kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 19.625412%

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Query_Exporting 5.1 + stereo Audio from prores 422 to mxf using ffmpeg
by Hardik Kanakia 30 Apr '15

30 Apr '15

Hello All, I want to export 5.1 channel + Stereo (8 tracks) with prores mov to MXF. Since I am very new to this world, and as i read through the post, Audio only exports 1 Audio channel from the source (in my case its prores 422 mov with 5.1+Stereo) need your help badly as i am stuck in the middle of the road !!! please help me with the command for getting an output to mxf Audio output: pcm 24le Thanks Hardik

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delay problems when using ffserver, ffmpeg for streaming of web cam and vlc for viewing.
by Adrian Schwartz 30 Apr '15

30 Apr '15

hello ffmpeg user group, I'm having delay problem ( when using ffserver and ffmpeg) I'm getting the error "ffmpeg past duration too large" when using the ffmpeg for streaming. VLC is configured to work in minimum delay and when streaming from // 192.168.1.1:8090/test1.asf it shows 2 sec delay, when the communication interface delay is aroung 15 msec. Is there some recommendation on how to lower the delay? Regards Adrian ##### #Streaming command: ##### ffmpeg -f dshow -rtbufsize 1M -i video="Logitech Webca"":audio="Microphone (2- Webcam C160)" -fflags nobuffer -tune zerolatency http://192.168.1.1:8090/feed1.ffm ######## ##ffserver config: ######## Port 8090 BindAddress 0.0.0.0 MaxClients 1000 MaxBandwidth 30000 CustomLog /var/log/ffserver.log NoDaemon <Feed feed1.ffm> File /tmp/feed1.ffm FileMaxSize 1M ACL allow 192.168.26.0 192.168.29.255 ACL allow 127.0.0.1 ACL allow 10.0.0.0 10.0.0.255 </Feed> <Stream test1.asf> Feed feed1.ffm Format asf VideoFrameRate 15 VideoSize 352x240 VideoBitRate 256 VideoGopSize 30 StartSendOnKey NoAudio </Stream> <Stream stat.html> Format status ACL allow localhost ACL allow 192.168.0.0 192.168.255.255 </Stream>

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Creating Streaming Server
by ELAMPOORNAN.ANANTHANESHAN 30 Apr '15

30 Apr '15

Hi, I would like to stream my web cam to a server url.rtmp:// a.rtmp.myserver.com/live2) and record it on the server. I would like to use RTMPE. Is that possible with FFMPEG if so can you recommend some code sample. I wonder, how would Amazon services help this process. *Regards,* E Ananthaneshan T.P: +9471 23 07125 E-mail: poornan(a)gmail.com

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