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Autres articles (38)

  • 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 (...)

  • Menus personnalisés

    14 novembre 2010, par

    MediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
    Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
    Menus créés à l’initialisation du site
    Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (5785)

  • How to overlay only part of a video using ffmpeg or a similar tool (not the full frame) [closed]

    26 octobre 2024, par velw

    I have two videos (let's say 1.mp4 and 2.mp4). I would like to overlay only the top-right quarter of 2.mp4 onto 1.mp4.

    


    The output would be a single video with the content from 1.mp4 in the top left, bottom left and bottom right, and the content from 2.mp4 in the top right.

    


    (To be clear, I don't mean shrinking anything. The output would show only three quarters of the frame from 1.mp4 and only one quarter of the frame from 2.mp4)

    


    Is it possible to do this with ffmpeg or something similar ?

    


  • VLC bitstream filters (similar to ffmpeg's -bsf:v h264_mp4toannexb)

    23 février 2016, par JohnDoeJ

    How do I apply bitsream filters to VLC (command line) to correct the output ?
    I know for a fact, that ffmpeg’s "-bsf:v h264_mp4toannexb" would fix the problems - are there any alternatives for VLC ?

    I currently have issues while decoding/re-restreaming http streams (example : http://89.142.192.34:4022/udp/232.4.3.8:5002) to hls playlist (parts are encoded in mpegts (codes : h264 + aac))

    A sample of the output I am getting from VLC :

    [h264 @ 0x7f530c0a15a0] number of reference frames (0+4) exceeds max (3; probably corrupt input), discarding one
    
[h264 @ 0x7f530c0a15a0] reference picture missing during reorder
    
[h264 @ 0x7f530c0a15a0] Missing reference picture, default is 72883
    
[00007f5308009ad8] stream_out_transcode stream out warning: Reseting video sync
    
[00007f5308c0ef38] ts demux warning: discontinuity received 0xb instead of 0xf (pid=5111)
    
[00007f5308c0ef38] ts demux warning: discontinuity received 0x9 instead of 0xb (pid=5112)
    
[h264 @ 0x7f530c1cf300] Reference 2 >= 2
    
[h264 @ 0x7f530c1cf300] error while decoding MB 3 24, bytestream 635
    
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected 15) for PID 0
    
libdvbpsi error (PSI decoder): TS discontinuity (received 9, expected 6) for PID 33
    
[h264 @ 0x7f530c1cf300] Found reference and non-reference fields in the same frame, which is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
    
[h264 @ 0x7f530c1cf300] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/incoming/ and contact the ffmpeg-devel mailing list. (ffmpeg-devel@ffmpeg.org)
    
[h264 @ 0x7f530c1cf300] decode_slice_header error
    
[h264 @ 0x7f530c0a15a0] reference picture missing during reorder
    
[h264 @ 0x7f530c0a15a0] reference picture missing during reorder
    
[h264 @ 0x7f530c0a15a0] Missing reference picture, default is 72891
    
[h264 @ 0x7f530c0a15a0] Missing reference picture, default is 72891
    
[h264 @ 0x7f530c138880] mmco: unref short failure
    
[h264 @ 0x7f530c138880] mmco: unref short failure
    
[h264 @ 0x7f530c138880] number of reference frames (0+4) exceeds max (3; probably corrupt input), discarding one

  • fate : Add test similar to ticket 1242

    7 mars 2016, par Michael Niedermayer
    fate : Add test similar to ticket 1242

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] tests/fate/demux.mak
    • [DH] tests/ref/fate/mkv-1242

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