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18 février 2011, par kent1

Pour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
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Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
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1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 37

Sur d’autres sites (7403)

ffmpeg trim .mp3 - output length forced to 2 seconds

22 septembre 2015, par Brooks

I have just downloaded the latest version of ffmpeg and I am trying to trim the first 14 and the last 6 seconds from a 40 seconds .mp3 file.

The problem I have is that doesn’t matter what -t X I use, the output is always only 2 seconds in length. It’s my first using ffmpeg but it seems like something is forcing it to limit the output to 2 seconds.

I tried a lot of commands including

ffmpeg -ss 00:00:14.358 -i input.mp3 -ab 32k -t 00:00:20.04 -c:a copy output.mp3 -y



ffmpeg -ss 14 -i input.mp3 -ab 32k -t 20 -c:a copy output.mp3 -y



ffmpeg -ss 14 -i input.mp3 -t 20 -acodec copy output.mp3 -y



ffmpeg -ss 14 -i input.mp3 -acodec copy output.mp3 -y



ffmpeg -ss 14 -t 20 -i input.mp3 output.mp3



ffmpeg -ss 14 -i input.mp3 -t 20 output.mp3

but the result is almost always a 2 sec mp3 file.
Now I’m out of ideas.

As requested this is the output from the console :

> Input #0, mp3, from 'C:\Track7.mp3':   Duration: 00:00:40.49, start:

> 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=       1kB time=00:00:00.00 bitrate= 752.3kbits/s video:0kB

> audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 110.287079%

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -t 5 -c:a copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @

> 0000000002fb02c0] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy

> "C:\Track7.mp3" -t 5 -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 Trailing options were found on the commandline. [mp3 @ 0000000003020300] Skipping 0

> bytes of junk at 0. [mp3 @ 0000000003020300] Estimating duration from

> bitrate, this may be inaccurate Input #0, mp3, from 'C:\Track7.mp3':  

> Duration: 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy -t 5

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 00000000003102c0] Skipping 0 bytes of junk at 0. [mp3 @

> 00000000003102c0] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -ss 00:00:14.358  -t 5 -i "C:\Track7.mp3" -c:a copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @

> 0000000002fb02c0] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -i "C:\Track7.mp3"-ss 00:00:14.358 -acodec copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 C:\Track7.mp3-ss: No such file or directory

> 

> C:\Je>ffmpeg -i "C:\Track7.mp3" -ss 00:00:14.358 -acodec copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb0240] Skipping 0 bytes of junk at 0. [mp3 @

> 0000000002fb0240] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=       0kB time=00:00:00.00 bitrate=N/A video:0kB audio:0kB

> subtitle:0kB other streams:0kB global headers:0kB muxing overhead:

> unknown Output file is empty, nothing was encoded (check -ss / -t /

> -frames parameters if used)

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -c:a copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb0220] Skipping 0 bytes of junk at 0. [mp3 @

> 0000000002fb0220] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -ab 32k -c:a copy

> "C:\Track7.mp3" -y ffmpeg version N-75463-g53e8bef Copyright (c)

> 2000-2015 the FFmpeg developers   built with gcc 4.9.3 (GCC)  

> configuration: --enable-gpl --enable-version3 --disable-w32threads

> --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 0000000002fb02c0] Skipping 0 bytes of junk at 0. [mp3 @

> 0000000002fb02c0] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

> 

> C:\Je>ffmpeg -ss 00:00:14.358 -i "C:\Track7.mp3" -ab 32k -t

> 00:00:20.04 -c:a copy "C:\Track7.mp3" -y ffmpeg version

> N-75463-g53e8bef Copyright (c) 2000-2015 the FFmpeg developers   built

> with gcc 4.9.3 (GCC)   configuration: --enable-gpl --enable-version3

> --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnu tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enab le-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 --ena ble-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --e nable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib   libavutil      55.  2.100 / 55.  2.100   libavcodec     57.  3.100 /

> 57.  3.100   libavformat    57.  2.100 / 57.  2.100   libavdevice    57.  0.100 / 57.  0.100   libavfilter     6.  6.100 /  6.  6.100   libswscale      4.  0.100 /  4.  0.100   libswresample   2.  0.100 / 

> 2.  0.100   libpostproc    54.  0.100 / 54.  0.100 [mp3 @ 00000000031903c0] Skipping 0 bytes of junk at 0. [mp3 @

> 00000000031903c0] Estimating duration from bitrate, this may be

> inaccurate Input #0, mp3, from 'C:\Track7.mp3':   Duration:

> 00:00:40.49, start: 0.000000, bitrate: 128 kb/s

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s Output #0, mp3, to 'C:\Track7.mp3':   Metadata:

>     TSSE            : Lavf57.2.100

>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, 128 kb/s Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help

> size=      32kB time=00:00:02.04 bitrate= 129.5kbits/s video:0kB

> audio:32kB subtitle:0kB other streams:0kB global headers:0kB muxing

> overhead: 1.410433%

What am I doing wrong ?

How can I capture video from different windows using ffmpeg ?

13 janvier 2016, par RdB
I have a proprietary IPTV player, and my goal is to capture a video from this player’s several windows simultaneously. I’m able to do that with ffmpeg and VLC (for instance) using vlc windows’ titles like this :
```
ffmpeg -f gdigrab -framerate 30 -i title="german.avi - VLC media player" -b:v 3M  germ.flv





ffmpeg -f gdigrab -framerate 30 -i title="2015-05-10 Sportscene.mkv - VLC media player" -b:v 3M  scot.flv
```
and so on.

But when I run 2 or more instances of that proprietary player, all of its windows’ titles are similar. So the question is how can I specify which window’s video in which file to record ?

Loss of frame order when saving AVFrames in a threaded environment

10 juin 2015, par Orphid

Context : I’m using ffmpeg’s api to extract frames from video files for test purposes. I’ve had a lot of issues getting it to work, and several re-writes. This time I’ve added tests at every stage to make sure I can isolate where errors are occurring.

Problem : I want to have a producer-consumer relationship set-up - a FrameProcessor class has a thread which pushes decoded frames into a queue, which a test client consumes. After adding this in, I suddenly found that my frames were being saved out of order, but I can’t see why this is happening because everything should be locked, and there’s only one producer and one consumer. Here is a section of code that adds frames to the queue :

void FrameProcessor::_do_processing()

{

    AVPacket packet;



    _is_processing = true;



    Logger::Info("Starting to buffer frames on a separate thread.");



    while(!_stop_processing_requested &amp;&amp; !_video->finished())

    {

        boost::mutex::scoped_lock lock(_mutex);



        if(!_video->get_next_packet(&amp;packet))

        {

            Logger::Info("The video ran out of frames, so FrameProcessor producer thread has stopped.");

            lock.unlock();

            break;

        }



        Logger::Info("FrameProcessor producer thread reads a packet from the stream (pts = " + std::to_string(packet.pts) + ").");



        int indx = packet.stream_index;



        auto decoder_it = _decoder_map.find(indx);



        if(decoder_it == _decoder_map.end())

        {

            Logger::Debug("FrameProcessor discarded a packet from stream index " + std::to_string(indx) + " because the stream was not enabled in the FrameProcessor.");

            av_free_packet(&amp;packet);

        }



        StreamDecoder* strm_dc = decoder_it->second;



        AVFrame* frm = strm_dc->decode_packet(&amp;packet);



        if(frm != NULL)

        {

            Logger::Debug("Producer thread pushed a frame into the FrameProcessor queue (pts = " + std::to_string(frm->pts) + ", coded num = " + std::to_string(frm->coded_picture_number) + ").");

            _frames.push(new TestFrame(frm));

            _print_queue();

        }



        av_free_packet(&amp;packet);



        lock.unlock();



        _wait_for_buffer_space();



    }



    Logger::Info("Finished buffering. Buffer stop requested? " + std::to_string(_stop_processing_requested));



    _is_processing = false;

}

The dequeue section of a test before adding producer thread :

while(v->get_next_packet(&amp;packet))

    {

        if(packet.stream_index == vi_first)

        {

            AVFrame* f = decoder.decode_packet(&amp;packet);



            if(f != NULL)

            {

                TestFrame* tf = new TestFrame(f);



                Logger::Info("|MAIN| Dequeued frame with pts " + std::to_string(tf->av_frame->pts) + " and coded num " + std::to_string(tf->av_frame->coded_picture_number) + ".");



                int cdc_num = tf->av_frame->coded_picture_number;



                TestFrame* tf1 = formatter.format(*tf);



                Logger::Debug("|MAIN| Saving frame with coded id " + std::to_string(cdc_num) + " as frame" + std::to_string(i) + ".ppm");



                save_ppm_frame(tf1->av_frame, v1_ctx->width, v1_ctx->height, "tst3", i++);



                delete tf1;

            }

            if(i > 40)

                break;

        }

    }

And the dequeue section of one of my tests after adding producer thread / FrameProcessor class :

while(!v->finished() &amp;&amp; i &lt; 40)

{

    tf = processor->next_frame();



    if(tf == NULL)

        continue;



    Logger::Info("|MAIN| Dequeued frame with pts " + std::to_string(tf->av_frame->pts) + " and coded num " + std::to_string(tf->av_frame->coded_picture_number) + ".");



    //formatting the frame somehow seems to cause the coded_picture_number to be zeroed, so get it now.

    int cdc_num = tf->av_frame->coded_picture_number;



    TestFrame* tf1 = formatter->format(*tf);



    Logger::Debug("|MAIN| Saving frame with coded id " + std::to_string(cdc_num) + " as frame" + std::to_string(i) + ".ppm");



    save_ppm_frame(tf1->av_frame, width, height, "tst4", i++);



    delete tf1;

}

The only two threads that should be in use are the main program thread, and the producer thread. The really odd thing is that I can see from my logs that all the coded ids are coming out in the correct order, but when I check the actual ppm files, the images are clearly not (hopefully you can see the dot in these images jumping backwards and forwards, when it should be moving in a smooth curve) :

frame26
frame27
frame28
frame29

To be clear, before adding the threading in, these frames were coming out correctly. Here’s an example of the logging information from two runs, one without threading, and one with (please be aware that coded_picture_number is not the same as display order - I’m just using the values to check that they match the successful earlier run.) I greped the logs to just show the consumer side of the logging :

Before adding producer thread & frame queue :

[2015-Jun-10 11:01:44.783523]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 0.

[2015-Jun-10 11:01:44.783859]: <debug> |MAIN| Saving frame with coded id 0 as frame0.ppm

[2015-Jun-10 11:01:44.784811]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 2.

[2015-Jun-10 11:01:44.784982]: <debug> |MAIN| Saving frame with coded id 2 as frame1.ppm

[2015-Jun-10 11:01:44.785910]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 3.

[2015-Jun-10 11:01:44.786075]: <debug> |MAIN| Saving frame with coded id 3 as frame2.ppm

[2015-Jun-10 11:01:44.786896]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 1.

[2015-Jun-10 11:01:44.787060]: <debug> |MAIN| Saving frame with coded id 1 as frame3.ppm

[2015-Jun-10 11:01:44.787967]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 5.

[2015-Jun-10 11:01:44.788145]: <debug> |MAIN| Saving frame with coded id 5 as frame4.ppm

[2015-Jun-10 11:01:44.789004]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 6.

[2015-Jun-10 11:01:44.789173]: <debug> |MAIN| Saving frame with coded id 6 as frame5.ppm

[2015-Jun-10 11:01:44.789946]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 4.

[2015-Jun-10 11:01:44.790124]: <debug> |MAIN| Saving frame with coded id 4 as frame6.ppm

[2015-Jun-10 11:01:44.790909]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 8.

[2015-Jun-10 11:01:44.791075]: <debug> |MAIN| Saving frame with coded id 8 as frame7.ppm

[2015-Jun-10 11:01:44.791895]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 9.

[2015-Jun-10 11:01:44.792060]: <debug> |MAIN| Saving frame with coded id 9 as frame8.ppm

[2015-Jun-10 11:01:44.793512]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 7.

[2015-Jun-10 11:01:44.793704]: <debug> |MAIN| Saving frame with coded id 7 as frame9.ppm

[2015-Jun-10 11:01:44.794566]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 11.

[2015-Jun-10 11:01:44.794733]: <debug> |MAIN| Saving frame with coded id 11 as frame10.ppm

[2015-Jun-10 11:01:44.795638]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 12.

[2015-Jun-10 11:01:44.795802]: <debug> |MAIN| Saving frame with coded id 12 as frame11.ppm

[2015-Jun-10 11:01:44.796633]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 10.

[2015-Jun-10 11:01:44.796797]: <debug> |MAIN| Saving frame with coded id 10 as frame12.ppm

[2015-Jun-10 11:01:44.797594]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 14.

[2015-Jun-10 11:01:44.797759]: <debug> |MAIN| Saving frame with coded id 14 as frame13.ppm

[2015-Jun-10 11:01:44.798524]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 15.

[2015-Jun-10 11:01:44.798666]: <debug> |MAIN| Saving frame with coded id 15 as frame14.ppm

[2015-Jun-10 11:01:44.799332]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 13.

[2015-Jun-10 11:01:44.799470]: <debug> |MAIN| Saving frame with coded id 13 as frame15.ppm

[2015-Jun-10 11:01:44.800176]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 17.

[2015-Jun-10 11:01:44.800312]: <debug> |MAIN| Saving frame with coded id 17 as frame16.ppm

[2015-Jun-10 11:01:44.801048]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 18.

[2015-Jun-10 11:01:44.801186]: <debug> |MAIN| Saving frame with coded id 18 as frame17.ppm

[2015-Jun-10 11:01:44.801842]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 16.

[2015-Jun-10 11:01:44.801977]: <debug> |MAIN| Saving frame with coded id 16 as frame18.ppm

[2015-Jun-10 11:01:44.802629]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 20.

[2015-Jun-10 11:01:44.802766]: <debug> |MAIN| Saving frame with coded id 20 as frame19.ppm

[2015-Jun-10 11:01:44.803427]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 21.

[2015-Jun-10 11:01:44.803564]: <debug> |MAIN| Saving frame with coded id 21 as frame20.ppm

[2015-Jun-10 11:01:44.804289]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 19.

[2015-Jun-10 11:01:44.804429]: <debug> |MAIN| Saving frame with coded id 19 as frame21.ppm

[2015-Jun-10 11:01:44.805131]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 23.

[2015-Jun-10 11:01:44.805266]: <debug> |MAIN| Saving frame with coded id 23 as frame22.ppm

[2015-Jun-10 11:01:44.805987]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 24.

[2015-Jun-10 11:01:44.806132]: <debug> |MAIN| Saving frame with coded id 24 as frame23.ppm

[2015-Jun-10 11:01:44.806792]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 22.

[2015-Jun-10 11:01:44.806929]: <debug> |MAIN| Saving frame with coded id 22 as frame24.ppm

[2015-Jun-10 11:01:44.807604]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 26.

[2015-Jun-10 11:01:44.807742]: <debug> |MAIN| Saving frame with coded id 26 as frame25.ppm

[2015-Jun-10 11:01:44.808411]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 27.

[2015-Jun-10 11:01:44.808550]: <debug> |MAIN| Saving frame with coded id 27 as frame26.ppm

[2015-Jun-10 11:01:44.809201]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 25.

[2015-Jun-10 11:01:44.809339]: <debug> |MAIN| Saving frame with coded id 25 as frame27.ppm

[2015-Jun-10 11:01:44.810079]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 29.

[2015-Jun-10 11:01:44.810243]: <debug> |MAIN| Saving frame with coded id 29 as frame28.ppm

[2015-Jun-10 11:01:44.810887]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 30.

[2015-Jun-10 11:01:44.811001]: <debug> |MAIN| Saving frame with coded id 30 as frame29.ppm

[2015-Jun-10 11:01:44.811672]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 28.

[2015-Jun-10 11:01:44.811785]: <debug> |MAIN| Saving frame with coded id 28 as frame30.ppm

[2015-Jun-10 11:01:44.812450]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 32.

[2015-Jun-10 11:01:44.812565]: <debug> |MAIN| Saving frame with coded id 32 as frame31.ppm

[2015-Jun-10 11:01:44.813262]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 33.

[2015-Jun-10 11:01:44.813380]: <debug> |MAIN| Saving frame with coded id 33 as frame32.ppm

[2015-Jun-10 11:01:44.813964]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 31.

[2015-Jun-10 11:01:44.814076]: <debug> |MAIN| Saving frame with coded id 31 as frame33.ppm

[2015-Jun-10 11:01:44.814664]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 35.

[2015-Jun-10 11:01:44.814778]: <debug> |MAIN| Saving frame with coded id 35 as frame34.ppm

[2015-Jun-10 11:01:44.815375]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 36.

[2015-Jun-10 11:01:44.815489]: <debug> |MAIN| Saving frame with coded id 36 as frame35.ppm

</debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info>

After adding producer thread & frame queue :

[2015-Jun-10 11:01:44.827119]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 0.

[2015-Jun-10 11:01:44.827459]: <debug> |MAIN| Saving frame with coded id 0 as frame0.ppm

[2015-Jun-10 11:01:44.829389]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 2.

[2015-Jun-10 11:01:44.829751]: <debug> |MAIN| Saving frame with coded id 2 as frame1.ppm

[2015-Jun-10 11:01:44.831429]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 3.

[2015-Jun-10 11:01:44.831758]: <debug> |MAIN| Saving frame with coded id 3 as frame2.ppm

[2015-Jun-10 11:01:44.833583]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 1.

[2015-Jun-10 11:01:44.833906]: <debug> |MAIN| Saving frame with coded id 1 as frame3.ppm

[2015-Jun-10 11:01:44.834585]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 5.

[2015-Jun-10 11:01:44.834691]: <debug> |MAIN| Saving frame with coded id 5 as frame4.ppm

[2015-Jun-10 11:01:44.835167]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 6.

[2015-Jun-10 11:01:44.835273]: <debug> |MAIN| Saving frame with coded id 6 as frame5.ppm

[2015-Jun-10 11:01:44.835753]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 4.

[2015-Jun-10 11:01:44.835857]: <debug> |MAIN| Saving frame with coded id 4 as frame6.ppm

[2015-Jun-10 11:01:44.836336]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 8.

[2015-Jun-10 11:01:44.836440]: <debug> |MAIN| Saving frame with coded id 8 as frame7.ppm

[2015-Jun-10 11:01:44.836897]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 9.

[2015-Jun-10 11:01:44.837002]: <debug> |MAIN| Saving frame with coded id 9 as frame8.ppm

[2015-Jun-10 11:01:44.837460]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 7.

[2015-Jun-10 11:01:44.837565]: <debug> |MAIN| Saving frame with coded id 7 as frame9.ppm

[2015-Jun-10 11:01:44.838080]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 11.

[2015-Jun-10 11:01:44.838200]: <debug> |MAIN| Saving frame with coded id 11 as frame10.ppm

[2015-Jun-10 11:01:44.838666]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 12.

[2015-Jun-10 11:01:44.838772]: <debug> |MAIN| Saving frame with coded id 12 as frame11.ppm

[2015-Jun-10 11:01:44.839322]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 10.

[2015-Jun-10 11:01:44.839428]: <debug> |MAIN| Saving frame with coded id 10 as frame12.ppm

[2015-Jun-10 11:01:44.839910]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 14.

[2015-Jun-10 11:01:44.840018]: <debug> |MAIN| Saving frame with coded id 14 as frame13.ppm

[2015-Jun-10 11:01:44.867898]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 15.

[2015-Jun-10 11:01:44.868013]: <debug> |MAIN| Saving frame with coded id 15 as frame14.ppm

[2015-Jun-10 11:01:44.868925]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 13.

[2015-Jun-10 11:01:44.869039]: <debug> |MAIN| Saving frame with coded id 13 as frame15.ppm

[2015-Jun-10 11:01:44.869938]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 17.

[2015-Jun-10 11:01:44.870051]: <debug> |MAIN| Saving frame with coded id 17 as frame16.ppm

[2015-Jun-10 11:01:44.871000]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 18.

[2015-Jun-10 11:01:44.871154]: <debug> |MAIN| Saving frame with coded id 18 as frame17.ppm

[2015-Jun-10 11:01:44.871792]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 16.

[2015-Jun-10 11:01:44.871907]: <debug> |MAIN| Saving frame with coded id 16 as frame18.ppm

[2015-Jun-10 11:01:44.872873]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 20.

[2015-Jun-10 11:01:44.872993]: <debug> |MAIN| Saving frame with coded id 20 as frame19.ppm

[2015-Jun-10 11:01:44.873606]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 21.

[2015-Jun-10 11:01:44.873719]: <debug> |MAIN| Saving frame with coded id 21 as frame20.ppm

[2015-Jun-10 11:01:44.874324]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 19.

[2015-Jun-10 11:01:44.874432]: <debug> |MAIN| Saving frame with coded id 19 as frame21.ppm

[2015-Jun-10 11:01:44.874931]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 23.

[2015-Jun-10 11:01:44.875046]: <debug> |MAIN| Saving frame with coded id 23 as frame22.ppm

[2015-Jun-10 11:01:44.875507]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 24.

[2015-Jun-10 11:01:44.875620]: <debug> |MAIN| Saving frame with coded id 24 as frame23.ppm

[2015-Jun-10 11:01:44.876087]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 22.

[2015-Jun-10 11:01:44.876190]: <debug> |MAIN| Saving frame with coded id 22 as frame24.ppm

[2015-Jun-10 11:01:44.876654]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 26.

[2015-Jun-10 11:01:44.876757]: <debug> |MAIN| Saving frame with coded id 26 as frame25.ppm

[2015-Jun-10 11:01:44.877242]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 27.

[2015-Jun-10 11:01:44.877345]: <debug> |MAIN| Saving frame with coded id 27 as frame26.ppm

[2015-Jun-10 11:01:44.877816]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 25.

[2015-Jun-10 11:01:44.877919]: <debug> |MAIN| Saving frame with coded id 25 as frame27.ppm

[2015-Jun-10 11:01:44.878453]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 29.

[2015-Jun-10 11:01:44.878558]: <debug> |MAIN| Saving frame with coded id 29 as frame28.ppm

[2015-Jun-10 11:01:44.879066]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 30.

[2015-Jun-10 11:01:44.879187]: <debug> |MAIN| Saving frame with coded id 30 as frame29.ppm

[2015-Jun-10 11:01:44.879676]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 28.

[2015-Jun-10 11:01:44.879790]: <debug> |MAIN| Saving frame with coded id 28 as frame30.ppm

[2015-Jun-10 11:01:44.908448]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 32.

[2015-Jun-10 11:01:44.908569]: <debug> |MAIN| Saving frame with coded id 32 as frame31.ppm

[2015-Jun-10 11:01:44.909642]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 33.

[2015-Jun-10 11:01:44.909756]: <debug> |MAIN| Saving frame with coded id 33 as frame32.ppm

[2015-Jun-10 11:01:44.910879]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 31.

[2015-Jun-10 11:01:44.910992]: <debug> |MAIN| Saving frame with coded id 31 as frame33.ppm

[2015-Jun-10 11:01:44.911988]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 35.

[2015-Jun-10 11:01:44.912147]: <debug> |MAIN| Saving frame with coded id 35 as frame34.ppm

[2015-Jun-10 11:01:44.913108]: <info> |MAIN| Dequeued frame with pts -9223372036854775808 and coded num 36.

[2015-Jun-10 11:01:44.913222]: <debug> |MAIN| Saving frame with coded id 36 as frame35.ppm

</debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info></debug></info>

And, basically, I can’t see the difference between what’s being logged between the two tests - they are both saving the frames with the same coded_picture_numbers in the same order as far as I can see, but the images are different. If you select one frame from both runs (say frame28.ppm), you can see that the frames at the same index are just not the same images. I’m still very new to C++, so apologies if this is just a trivial general error.

EDIT :

I’ve used a work around to solve this - by removing the whole producer-consumer model and having the FrameProducer simply decode the next frame when requested. This isn’t really an answer to what’s going wrong here, but I understand that it’s difficult for members to help with something for which it’s just impractical to give sufficient code to reproduce.

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