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  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Gestion de la ferme

    2 mars 2010, par

    La ferme est gérée dans son ensemble par des "super admins".
    Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
    Dans un premier temps il utilise le plugin "Gestion de mutualisation"

Sur d’autres sites (6930)

  • FFMEPG - How to resolve 'Reinit context to WxH ... deprecated pixel format'

    30 juin 2022, par hi im Bacon

    I am using the pyav library to read and process video data and as I am reading through the videos I am getting lots (and lots) of the following output.

    


    I am creating the videos by segmenting either a much larger source file or RTSP/HTTP IP camera.

    


    I would love to understand what this output actually means, and what I can do to prevent its output

    


    ffmpeg creating videos :

    


    ffmpeg -y -i https://manifest.googlevideo.com/api/... -pix_fmt yuvj422p -c:v libx264 -an -vf scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease -r 12 -vsync cfr -x264opts keyint=12:min-keyint=12 -f segment -segment_format matroska -segment_time 5 -initial_offset 1656497474.686672 -strftime 1 /tmp/tmp87cc1n2o/%Y-%m-%dT%H%M%S.mkv -loglevel error


    


    python :

    


    container = av.open(io.BytesIO(...))
for frame in container.decode(video=0):
   ...


    


    2022-06-30 14:45:00,964 DEBUG:****:Creating <***.core.generators.av.AVGenerator object at 0x7f13340abd50> with target path: <_io.BytesIO object at 0x7f13341c93b0>
2022-06-30 14:45:00,966 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:00,966 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuvj422p
2022-06-30 14:45:00,984 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:01,045 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
2022-06-30 14:45:01,046 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuvj422p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 9 more times)
2022-06-30 14:45:01,194 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
2022-06-30 14:45:01,215 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 17 more times)
2022-06-30 14:45:01,384 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 3 more times)
2022-06-30 14:45:01,398 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 22 more times)
2022-06-30 14:45:01,550 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p
deprecated pixel format used, make sure you did set range correctly
deprecated pixel format used, make sure you did set range correctly
 (repeated 2 more times)
2022-06-30 14:45:01,592 DEBUG:libav.h264:Reinit context to 1280x720, pix_fmt: yuv420p


    


  • Convert TS-Stream to MKV with ffmpeg [on hold]

    17 septembre 2018, par night4awk

    I’m using ffmpeg 3.2.7 and I have a problem converting a ts-file lossless to mkv.
    The source file is a dumped IPTV-stream recorded with dumprtp (from dvbstream 0.5).

    ffmpeg -i Test.ts -map 0:0 -map 0:2 -vcodec copy -acodec copy -f matroska Test.mkv

    The convertion is successful, but the output file is pixelated every few seconds.

    When I’m converting it with MKVToolnix everything looks fine.

    Does anyone has a solution for that problem ?
    Maybe some option to sync the stream correctly ?

    Here’s a sample output :

    # ffmpeg -i Test.ts -map 0:0 -map 0:2 -vcodec copy -acodec copy -f matroska Test.mkv
    
ffmpeg version 3.2.7 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 6.3.0 (OpenWrt GCC 6.3.0 r212-46f973b)
    
  configuration: --enable-cross-compile --cross-prefix=i486-openwrt-linux-gnu- --arch=i386 --target-os=linux --prefix=/opt --pkg-config=pkg-config --enable-shared --enable-static --enable-pthreads --enable-zlib --disable-doc --disable-debug --disable-lzma --disable-vaapi --disable-vdpau --disable-outdevs --enable-avresample --enable-libopus --enable-small --enable-gpl --enable-libmp3lame --enable-libx264
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[NULL @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[NULL @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mp3 @ 0x81fb860] Header missing
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 3 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 3 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 7 times
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] SPS unavailable in decode_picture_timing
    
[h264 @ 0x81f9580] non-existing PPS 0 referenced
    
[h264 @ 0x81f9580] decode_slice_header error
    
[h264 @ 0x81f9580] no frame!
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] reference picture missing during reorder
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] Missing reference picture, default is 2147483647
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 3 times
    
[h264 @ 0x81f9580] reference picture missing during reorder
    
    Last message repeated 2 times
    
[h264 @ 0x81f9580] Missing reference picture, default is 65627
    
    Last message repeated 2 times
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 1 times
    
[h264 @ 0x81f9580] mmco: unref short failure
    
    Last message repeated 3 times
    
[h264 @ 0x81f9580] Increasing reorder buffer to 2
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 295 times
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 13 times
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mp3 @ 0x81fb860] Header missing
    
    Last message repeated 2 times
    
[mpegts @ 0x81f6280] decoding for stream 1 failed
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] PES packet size mismatch
    
    Last message repeated 1 times
    
[mpegts @ 0x81f6280] Could not find codec parameters for stream 1 (Audio: mp3, 0 channels, s16p): unspecified frame size
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, mpegts, from 'Test.ts':
    
  Duration: 00:01:00.54, start: 48882.340000, bitrate: 3181 kb/s
    
    Stream #0:0[0x100]: Video: h264, yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:11 DAR 20:11], 25 fps, 50 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x103]: Audio: mp3, 0 channels, s16p
    
    Stream #0:2[0x102]: Audio: mp2, 48000 Hz, stereo, s16p, 192 kb/s
    
    Stream #0:3[0x101]: Audio: ac3, 48000 Hz, stereo, fltp, 384 kb/s
    
Output #0, matroska, to 'Test.mkv':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p(tv, bt470bg, top first), 720x576 [SAR 16:11 DAR 20:11], q=2-31, 25 fps, 50 tbr, 1k tbn, 90k tbc
    
    Stream #0:1: Audio: mp2 (P[0][0][0] / 0x0050), 48000 Hz, stereo, 192 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:2 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
.
    
.
    
.
    
[mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] changing packet size to 192
    
    [mpegts @ 0x81f6280] changing packet size to 188
    
[mpegts @ 0x81f6280] PES packet size mismatch
    
frame= 2971 fps=2674 q=-1.0 Lsize=   17441kB time=00:00:59.90 bitrate=2385.2kbits/s speed=53.9x    
    
video:16037kB audio:1410kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

    Thank you

  • Making volume adjustments at precise time with ffmpeg -filter_complex

    25 février 2023, par a1s2d3f4

    I am using the following command to mute parts of the audio file with ffmpeg :

    


    ffmpeg.exe -y -i "C:\temp\inputfile3.wav" -filter_complex_script "C:\temp\filter_complex_cmds.txt" "C:\temp\outputfile3.wav"


    


    Inside filter_complex_cmd.txt I have :

    


    [0]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume='if(between(t,0.95,1.05),0*(t-0.95) + 0,1)':eval=frame,volume='if(between(t,1.15,1.25),0*(t-1.15) + 0,1)':eval=frame,volume='if(between(t,1.41,1.49),0*(t-1.41) + 0,1)':eval=frame,volume='if(between(t,2.10,2.35),0*(t-2.10) + 0,1)':eval=frame,volume='if(between(t,2.75,2.85),0*(t-2.75) + 0,1)':eval=frame, etc. x1000...


    


    You get the idea - many, many calls to reduce volume at specific times.
However, when I look at outputfile3.wav, the volume is not reduced from 0.95000 to 1.05000 seconds, but instead from 0.952018 to 1.068118 (i.e. off by 2 and 18 milliseconds respectively) and not from 1.150000 to 1.250000 seconds but from 1.160998 to 1.253878 milliseconds, etc. It can sometimes be off by as many as 20 milliseconds.

    


    Can anyone tell me what's going on and what to do to make it precise ?

    


    Also, while I can reserve it for a separate question, but I also want to be able to find a fade out/fade in commands that would make this change to and from silence a bit more smooth by dialing it down and up over the course of 20 milliseconds around my "volume 0" times.

    


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