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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

Sur d’autres sites (5596)

  • How do I alter my FFMPEG command to make my HTTP Live Streams more efficient ?

    17 octobre 2014, par Robert

    I want to reduce the muxing overhead when creating .ts files using FFMPEG.

    Im using FFMPEG to create a series of transport stream files used for HTTP live streaming.

    ./ffmpeg -i myInputFile.ismv \
    
         -vcodec copy \
    
         -acodec copy \
    
         -bsf h264_mp4toannexb \
    
         -map 0 \
    
         -f segment \
    
         -segment_time 10\
    
         -segment_list_size 999999 \
    
         -segment_list output/myVarientPlaylist.m3u8 \
    
         -segment_format mpegts \
    
         output/myAudioVideoFile-%04d.ts

    My input is in ismv format and contains a video and audio stream :

    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x240, 348 kb/s, 29.97 tbr, 10000k tbn, 59.94 tbc
    
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 63 kb/s

    There is an issues related to muxing that is causing a large amout of overhead to be added to the streams. This is how the issue was described to me for the audio :

    enter image description here

    So for a given aac stream, the overhead will be 88% (since 200 bytes will map to 2 x 188 byte packets).

    For video, the iframe packets are quite large, so they translate nicely into .ts packets, however, the diffs can be as small as an audio packet, therefore they suffer from the same issue.

    The solution is to combine several aac packets into one larger stream before packaging them into .ts. Is this possible out of the box with FFMPEG ?

  • Revision 17292 : Update Skeleton/OggIndex support to Skeleton 4.0. ffmpeg2theora now ...

    16 juin 2010, par j — Log

    Update Skeleton/OggIndex ? support to Skeleton 4.0.
    ffmpeg2theora now writes Skeleton 4.0 with index by default.
    Patch by Chris Pearce

  • can't read mp4 in opencv3.2 (ubuntu, python3)

    28 mars 2017, par lhk

    I’ve ran into a problem with my opencv installation, it is unable to open an mp4 video. My system is ubuntu 16.04, 64bit, opencv3.2 used from python 3.5.

    VideoCapture.read returns False and None.

    There are other questions with this problem, but they target different platforms or different opencv versions.

    Apparently, I’m missing the proper codec.
    So I ran make uninstall from my build directory, purged opencv* with apt and built from source again. This time making sure that ffmpeg was installed before the compilation.

    Here are my steps :

    • clone opencv and opencv_contrib
    • cd opencv/
    • mkdir build
    • cd build
    • cmake -D CMAKE_BUILD_TYPE=RELEASE     -D CMAKE_INSTALL_PREFIX=/usr/local     -D INSTALL_PYTHON_EXAMPLES=ON     -D INSTALL_C_EXAMPLES=OFF     -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules     -D BUILD_EXAMPLES=ON ..
    • make -j 8
    • sudo make install

    I checked the output of cmake, ffmpeg is there :

    Video I/O:
    
--     DC1394 1.x:                  NO
    
--     DC1394 2.x:                  NO
    
--     FFMPEG:                      YES
    
--       avcodec:                   YES (ver 56.60.100)
    
--       avformat:                  YES (ver 56.40.101)
    
--       avutil:                    YES (ver 54.31.100)
    
--       swscale:                   YES (ver 3.1.101)
    
--       avresample:                NO
    
--     GStreamer:                   NO
    
--     OpenNI:                      NO
    
--     OpenNI PrimeSensor Modules:  NO
    
--     OpenNI2:                     NO
    
--     PvAPI:                       NO
    
--     GigEVisionSDK:               NO
    
--     Aravis SDK:                  NO
    
--     UniCap:                      NO
    
--     UniCap ucil:                 NO
    
--     V4L/V4L2:                    NO/YES
    
--     XIMEA:                       NO
    
--     Xine:                        NO
    
--     gPhoto2:                     NO

    But the problem persists. How can I fix this ?

    UPDATE

    I had to manually remove some .so files from /usr/local.

    Then I installed all avi related codecs I could find.
    https://wiki.ubuntuusers.de/Codecs/
    plus libavcodec-extra and ffmpeg

    Then I recompiled and now it works.

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