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Autres articles (59)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • 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 (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (4474)

  • ffmpeg overlay time offset

    24 juillet 2012, par Produitbrut

    I'm trying to add overlays to an input video with ffmpeg that appear after a time period after the video starts.

    The basic way to add an overlay is :

    ffmpeg -i myvideo.avi -vf "movie=my_overlay.avi [ovl]; [in][ovl] overlay=0:0 [out]" output.avi

    But this simply adds the overlay video (or image) from the start of the input video until the input video ends or the overlay video ends.

    I know how to offset the overlay video using movie=my_overlay.avi:seek_point=1.4, but what about an offset on the input video ?

    I could always clip the video to the desired point, add overlay on the second clip, then stitch the two but that's not very efficient.

  • encoding using ffmpeg for mac app

    9 mai 2012, par user946061

    In my mac app i am using ffmpeg library for video encoding in 4 different types of formats for iPhone, iPod, AppleTV and HD.But the encoding takes so much time and the CPU usage becomes very low.I want someone to get me any idea to maximize this CPU usage and minimize the encoding time-period so that the application may enhance the performance level.

  • Concatenate two mp4 files using ffmpeg

    9 mars 2017, par Mark L

    I’m trying to concatenate two mp4 files using ffmpeg. I need this to be an automatic process hence why I chose ffmpeg. I’m converting the two files into .ts files and then concatenating them and then trying to encode that concated .ts file. The files are h264 and aac encoded and I’m hoping to keep the quality the same or as close to original as possible.

    ffmpeg -i part1.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part1.ts
    
ffmpeg -i part2.mp4 -vcodec copy -vbsf h264_mp4toannexb -acodec copy part2.ts
    
cat part1.ts part2.ts > parts.ts
    
ffmpeg -y -i parts.ts -acodec copy -ar 44100 -ab 96k -coder ac -vbsf h264_mp4toannexb parts.mp4

    Unfortunately I’m getting the following error message coming back from ffmpeg during encoding :

    [h264 @ 0x1012600]sps_id out of range
    
[h264 @ 0x1012600]non-existing SPS 0 referenced in buffering period
    
[h264 @ 0x1012600]sps_id out of range
    
[h264 @ 0x1012600]non-existing SPS 0 referenced in buffering period
    
[NULL @ 0x101d600]error, non monotone timestamps 13779431 >= 13779431kbits/s    
    
av_interleaved_write_frame(): Error while opening file

    This happens about half way through encoding which makes me think that you can’t concat two .ts files together and have it work. Any help would be much appreciated.

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