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    Une file d’attente stockée dans la base de donnée
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  • Les thèmes de MediaSpip

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    3 avril 2016, par kent1@… — Log

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    #60 - missing "break" in module.audio-video.quicktime.php
    #59 - .gitignore comments
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  • Can't change video subtitles codec using ffmpeg

    31 mars 2016, par jpo38

    I’ve got a mkv file with somes streams embedded :

    Stream #0:0: Video: h264 (High), yuv420p(tv, smpte170m/smpte170m/bt709), 720x300, SAR 1:1 DAR 12:5, 25 fps, 25 tbr, 48003.07 tbn, 50 tbc (default)
    Stream #0:1(tr): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
    Stream #0:2(fr): Subtitle: dvd_subtitle, 720x300

    When playing on my PC, I can see subtitles. When playing it from my old DVD/DIVX player, I cannot see the subtitles (other mkv/avi work fine).

    So I wanted to change the subtitle encoding, to see if another one could work with my DVD player.

    ffmpeg -encoders reports :

    S..... ssa                  ASS (Advanced SubStation Alpha) subtitle (codec ass)
    S..... ass                  ASS (Advanced SubStation Alpha) subtitle
    S..... dvbsub               DVB subtitles (codec dvb_subtitle)
    S..... dvdsub               DVD subtitles (codec dvd_subtitle)
    S..... mov_text             3GPP Timed Text subtitle
    S..... srt                  SubRip subtitle (codec subrip)
    S..... subrip               SubRip subtitle
    S..... text                 Raw text subtitle
    S..... webvtt               WebVTT subtitle
    S..... xsub                 DivX subtitles (XSUB)

    So I tried :

    ffmpeg -i input.mkv -acodec copy -vcodec copy -scodec "codec" converted.mkv

    with various versions of "codec". None of them will work (except the original dvdsub...) :

    xsub reports :

    [matroska @ 0x24558c0] Subtitle codec 94211 is not supported.
    av_interleaved_write_frame(): Function not implemented
    [matroska @ 0x24558c0] Subtitle codec 94211 is not supported.
    Error writing trailer of mustang_converted.mkv: Function not implementedframe=  244 fps=0.0 q=-1.0 Lsize=       1kB time=00:00:10.01 bitrate=   1.0kbits/s speed=1.23e+03x    
    video:321kB audio:235kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    Conversion failed!

    ssa or ass reports :

    [ssa @ 0x262e000] Only SUBTITLE_ASS type supported.
    Subtitle encoding failed

    others reports :

    Error while opening encoder for output stream #0:2 - maybe incorrect parameters such as bit_rate, rate, width or height

    What am I doing wrong ? Are some subtitles codec incompatible with the current video or audio codec ? Should I change those instead of copying ?

    Alternatively, is there an option to merge subtitle within the video images stream for good (and then have only two output streams : audio and video but preserve subtitles display) ?

    Note : Answer using another tool than ffmpeg are acceptable, if working under Linux (mint).

  • FFMPEG : Creating video stream from non-consecutively numbered png sequence [closed]

    8 mars 2016, par frageDE

    I have used VLC to decompose a video stream into frames, and it decomposed in a way that it leaps 5 frames per save, so the images are ordered like this :

    scene04436.png
    scene04441.png
    scene04446.png
    scene04451.png
    scene04456.png
    scene04461.png
    scene04466.png

    Now I want them to be a video stream again. I have already tried FFMPEG and AVCONV commands, they didn’t work out for me. The following command gives the error below :

    ffmpeg -framerate 1/5 -i scene%05d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

    EDIT : Yes, I tried Googleing the ffmpeg commands, they did not work, mostly gave the error of :

       ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers built on Mar 16 2015 13:26:50 with gcc 4.6.3

    The ffmpeg program is only provided for script compatibility and will be removed in a future release. It has been deprecated in the Libav project to allow for incompatible command line syntax improvements in its replacement called avconv

    (see Changelog for details). Please use avconv instead.
    Input #0, image2, from 'scene%05d.png':
     Duration: 00:00:05.00, start: 0.000000, bitrate: N/A
       Stream #0.0: Video: png, bgra, 720x480, 0.20 tbr, 0.20 tbn, 0.20 tbc

    Unrecognized option 'c:v'
    Failed to set value 'libx264' for option 'c:v'

    EDIT2 : This is the version output on my console for the FFMPEG

    ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
    built with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
    configuration: --disable-yasm
    libavutil      55. 17.103 / 55. 17.103
    libavcodec     57. 24.102 / 57. 24.102
    libavformat    57. 25.100 / 57. 25.100
    libavdevice    57.  0.101 / 57.  0.101
    libavfilter     6. 31.100 /  6. 31.100
    libswscale      4.  0.100 /  4.  0.100
    libswresample   2.  0.101 /  2.  0.101

    Any suggestions ?