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Autres articles (74)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (7286)

  • mp3dec : remove a pointless local variable.

    28 juillet 2012, par Anton Khirnov

    mp3dec : remove a pointless local variable.

  • proresenc : make a variable local to the loop where it is used

    1er juillet 2012, par Mans Rullgard

    proresenc : make a variable local to the loop where it is used

  • H264 to MP4 with Bframe play back and forth on google chrome[ffmpeg]

    2 mai 2017, par Ravi Agola

    I want to generate a mp4 container with h264 encoded file.

    H264 file contains [I P B B][P B B][P B B][P B B] frames.

    when I generate a mp4 file with FFmpeg, It works well with FFplay as well as VLC but on google-chrome mp4 file plays frame back and forth.

    ffmpeg -i input.h264 -vcodec copy output.mp4

    when i use internal codec library(libx264) it works well on (ffplay,vlc and google-chrome)

    ffmpeg -i input.h264 -vcodec h264 output.mp4

    as above command transcode h264(native) to h264(x264), I don’t want to transcode file as I will be using it with ffmpeg library.

    when I use h264 without B frame it works well in both cases.

    I have tried some experiment with sample test file available here.

    direct conversion(MKV to MP4) works well with chrome as below

    ffmpeg -i jellyfish-3-mbps-hd-h264.mkv -vcodec copy output.mp4

    (MKV to H264 and H264 to MP4) plays back and forth on chrome

    ffmpeg -i jellyfish-3-mbps-hd-h264.mkv -vcodec copy output.h264
    ffmpeg -i output.h264 -vcodec copy output.mp4

    I get message in this case
    [mp4 @ 0xb6f8b20] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
    [mp4 @ 0xb6f8b20] pts has no value"

    what can be a reason behind this behavior ?

    Thanks.

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