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  • D’autres logiciels intéressants

    12 avril 2011, par

    On ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
    La liste suivante correspond à des logiciels qui tendent peu ou prou à faire comme MediaSPIP ou que MediaSPIP tente peu ou prou à faire pareil, peu importe ...
    On ne les connais pas, on ne les a pas essayé, mais vous pouvez peut être y jeter un coup d’oeil.
    Videopress
    Site Internet : (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

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  • FFMPEG use -strict -2

    21 août 2020, par GILO

    Hi I've been recently using the command below

    


    Ffmpeg -i song.mp3 -loop 1 -i image.jpg -filter_complex \
"[0:a]showfreqs=mode=line:ascale=log:fscale=log:s=1280x518[sf]; \
 [0:a]showwaves=s=1280x202:mode=p2p[sw]; \
 [sf][sw]vstack[fg]; \
 [1:v]scale=1280:-1,crop=iw:720[bg]; \
 [bg][fg]overlay=shortest=1:format=auto,format=yuv420p,drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf:fontcolor=white:x=10:y=10:text='\"Rated80s Prophets Prey\" by Comics On Film'[out]" \
-map "[out]" -map 0:a -c:v libx264 -preset fast -crf 18 -c:a libopus output.mp4 


    


    from this post Showfreqs and showwaves over background image ?.

    


    


    However I changed the output file to from output.mkv to output.mp4 as I would prefer to use mp4

    


    


    I get the below error

    


    [mp4 @ 0x7f962b816800] opus in MP4 support is experimental, add '-strict -2' if you want to use it.
Could not write header for output file #0 (incorrect codec parameters ?) : Experimental feature
Error initializing output stream 0:0 —
[libopus @ 0x7f962b819800] 1 frames left in the queue on closing

    


    The main information from that error is

    


    


    opus in MP4 support is experimental, add '-strict -2' if you want to use it.

    


    


    but where do I use -strict -2 within the command to make the command possible

    


  • ffmpeg can't transcode DVD ac3 audio stream, but VLC can play it

    21 février 2020, par RalphORama

    I’m attempting to transcode a DVD to a single MKV file. I’ve had success in the past with other DVDs, but I’m running into an error I haven’t seen before.

    First I concatenate the VOB files I want to transcode :

    cat VTS_02_1.VOB VTS_02_2.VOB VTS_02_3.VOB > WMAV.VOB

    ffprobe output :

    $ ffprobe -analyzeduration 100M -probesize 100M WMAV.VOB                                                                         Input #0, mpeg, from 'WMAV.VOB':
    
  Duration: 01:05:19.42, start: 0.300300, bitrate: 5686 kb/s
    
    Stream #0:0[0x1bf]: Data: dvd_nav_packet
    
    Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top first), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
    
Unsupported codec with id 100357 for input stream 0

    Then I run this command to transcode the file :

    ffmpeg -analyzeduration 100M -probesize 100M \
    
  -i WMAV.VOB \
    
  -map 0:1 -map 0:2 \
    
  -c:v libx264 -preset slow -tune film -crf 21 \
    
  -c:a aac -b:a 192k \
    
  wmav.mkv

    However, when I include -c:a aac, I get thousands of errors like this :

    Error while decoding stream #0:2: Error number -16976906 occurred
    
[ac3 @ 000002bd24d8eec0] expacc 127 is out-of-range
    
[ac3 @ 000002bd24d8eec0] error decoding the audio block

    There doesn’t seem to be any issue with the audio stream since it plays back fine in VLC. The transcode succeeds if I use -c:a copy.

    What is causing this error and how could I fix the problem ?

  • avformat/segafilmenc : Avoid seek when writing header

    17 juillet 2020, par Andreas Rheinhardt
    avformat/segafilmenc : Avoid seek when writing header

    Up until now, the Sega FILM muxer would first write all the packet data,
    
then shift the data (in the muxer's write_trailer function) by the amount
    
necessary to write the header at the front (which entails a seek to the
    
front), then seek back to the beginning and actually write the header.
    

    This commit changes this : The dynamic buffer that is used to write the
    
sample table (containing information about each sample in the file) is
    
now used to write the complete header. This is possible because the size
    
of everything in the header except the sample table is known in advance.
    
Said buffer can then be used as one of the two temporary buffers used
    
for shifting which also reduces the amount one has to allocate for this.
    
Thereby the header will be written when shifting, so that the second
    
seek to the beginning is unnecessary.
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavformat/segafilmenc.c

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