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  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

  • Problèmes fréquents

    10 mars 2010, par

    PHP et safe_mode activé
    Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
    La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

Sur d’autres sites (12151)

  • Revision 663916cea7 : SVC improvements These changes were originally made in the Stratacaster team-re

    12 octobre 2013, par Ivan Maltz

    Changed Paths :
     Modify /libs.mk


     Add /test/svc_test.cc


     Modify /test/test.mk


     Modify /vp9/common/vp9_onyx.h


     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/vp9_cx_iface.c


     Modify /vp9_spatial_scalable_encoder.c


     Modify /vpx/exports_enc


     Add /vpx/src/svc_encodeframe.c


     Add /vpx/svc_context.h


     Modify /vpx/vp8cx.h


     Modify /vpx/vpx_codec.mk



    SVC improvements

    These changes were originally made in the Stratacaster team-review repository

    commit e114bffcd82ad74c3696ec58e13c0ac895d6c82d
    Author : Charles 'Buck' Krasic <ckrasic@google.com>
    Date : Mon Oct 14 16:52:13 2013 -0700

    Make dummy frame handling a bit more explicit, fixing bug
    with single layer encodes.

    Squashed commit of the following :

    commit 1ebbfd976c0fadb02bf1ea562a2d0e3f0206daad
    Merge : ac468dd 54e88b7
    Author : Ivan Maltz <ivanmaltz@google.com>
    Date : Fri Oct 11 17:29:58 2013 -0700

    Move SVC code from vp9_spatial_scalable_encoder to libvpx module accessible
    from ffmpeg

    commit 54e88b78b160becc9569fc3c6cb6b0a8c95dc357
    Author : Ivan Maltz <ivanmaltz@google.com>
    Date : Tue Oct 8 09:08:40 2013 -0700

    common svc encoding code for sample app and ffmpeg

    added svc_encodeframe.c, svc_context.h, svc_test.cc

    vp9_spatial_scalable_encoder uses vpx_svc_encode

    commit 5616ec8e2e3d3e8d277333d8a9242f6c70151162
    Merge : 4528014 e29137d
    Author : Ivan Maltz <ivanmaltz@google.com>
    Date : Tue Oct 8 08:47:58 2013 -0700

    Merge branch 'master' into stratacaster

    commit 45280148450b1f3d61e390df8aadedf85cd5bce1
    Merge : bb2b675 1ab60f7
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Fri Oct 4 10:22:31 2013 -0700

    Merge branch 'master' into stratacaster

    commit bb2b675e595dc9bfc8551e963edf56800c3aea61
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Wed Oct 2 12:37:26 2013 -0700

    Track individual frame sizes and psnrs instead of averages.

    commit c6d303b714795c81e7ceb4173967115c9f8ff5b7
    Merge : fa87df9 3583087
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Fri Sep 27 10:05:35 2013 -0700

    Merge branch 'master' into stratacaster

    commit fa87df94fba923d9f7aeb8ae20c6e15f777e00b5
    Merge : bf22d71 3c465af
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Thu Sep 26 16:10:31 2013 -0700

    Merge branch 'master' into stratacaster

    commit bf22d7144895a82e0c348ac177c8a261b9e2b88e
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Thu Sep 26 11:10:34 2013 -0700

    Parameterized quantizer, 16th scalefactors, more logging, enabled single
    layer encodes to generate baseline.

    commit ceffd7e6025b765f9886b5ea0f324248aa37e327
    Author : Sujeevan Rajayogam <sujee@google.com>
    Date : Thu Sep 19 10:04:49 2013 -0700

    - Include new mode for 3 layer I frame with 5 total layers.
    - Refactor svc api.

    Change-Id : Ie4d775e21e006fa597d884c59488dc999478e9b5

  • FFMPEG screen grab of windows desktop and then exporting to multiple bandwidth ts and m3u8 files with master playlist

    26 juillet 2018, par Tank Daniels

    Forgive me as this is my first post as I’m really stuck and need help. My boss needs me to screen capture a windows desktop as input and be able to output at least four outputs dependent on bandwidth. Each output "Stream"(im guessing is the right terminology) must have its own .ts files and .m3u8 files, along with a master m3u8 playlist that lists the four individual m3u8 files.

    Every attempt ive made only produces a master m3u8 file with a single listing of an output stream. (Code enclosed below).

    The end result I need to produce is to have a master m3u8 that can go into a webpage that can stream mp4 hls of the users screen grab and that video output will be changed dependant upon the users bandwidth available. If you can please help me with any advice I will be eternally grateful as I need to impress my new boss in my new job, and I’ve been working on this for ages now with no joy.

    Example :
    This is what I need it to look like.

    What the M3U8 needs to look like

    Example :
    This is what it actually looks like now.

    What the current M3U8 actually looks like when i run my code

    Below is the code I am currently using. Please help.

    ffmpeg -f dshow -i video="UScreenCapture":audio="virtual-audio-capturer" -master_pl_name master.m3u8 -master_pl_publish_rate 30 -tune fastdecode -vf scale=w=640:h=360:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod  -b:v 800k -maxrate 856k -bufsize 1200k -b:a 96k -hls_segment_filename 360p_%03d.ts 360p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=842:h=480:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 1400k -maxrate 1498k -bufsize 2100k -b:a 128k -hls_segment_filename 480p_%03d.ts 480p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1280:h=720:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 2800k -maxrate 2996k -bufsize 4200k -b:a 128k -hls_segment_filename 720p_%03d.ts 720p.m3u8 -master_pl_name master.m3u8 -master_pl_publish_rate 30 -vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease -c:a aac -ar 48000 -c:v h264 -crf 20 -sc_threshold 0 -g 48 -keyint_min 48 -hls_time 4 -hls_playlist_type vod -b:v 5000k -maxrate 5350k -bufsize 7500k -b:a 192k -hls_segment_filename 1080p_%03d.ts 1080p.m3u8

    Many Thanks for looking. Chris.

  • FFMPEG - How to transcode and segment to multiple bitrates ?

    25 juillet 2014, par ipegasus

    I would like to know how to use FFMPEG to transcode video (Prores codec) and segment videos to multiple bitrates. Is it possible to do it in one command ?

    Current working solution with X264 :

    1. Encode Videos Using X264.

      /home/ubuntu/bin/ffmpeg -y -i "$video_path" -threads 1 -f mpegts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=12:keyint=36:bitrate=200" -s 416x234 "$DIR_VIDEO_OUTPUT/$filename"/p1.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=12:keyint=36:bitrate=400" -s 480x270 "$DIR_VIDEO_OUTPUT/$filename"/p2.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=24:keyint=72:bitrate=600" -s 640x360 "$DIR_VIDEO_OUTPUT/$filename"/p3.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile baseline -x264opts "fps=24:keyint=72:bitrate=1200" -s 640x360 "$DIR_VIDEO_OUTPUT/$filename"/p4.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=1800" -s 960x540 "$DIR_VIDEO_OUTPUT/$filename"/p5.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=2500" -s 960x540 "$DIR_VIDEO_OUTPUT/$filename"/p6.ts \
      -acodec libfaac -ab 64k -ar 44100 -vcodec libx264 -vprofile main -x264opts "fps=24:keyint=72:bitrate=4500" -s 1280x720 "$DIR_VIDEO_OUTPUT/$filename"/p7.ts

    2. Using an extrenal segmenter

      cd $DIR_VIDEO_OUTPUT/$filename
      mkdir M3U8
      for p in p1 p2 p3 p4 p5 p6 p7 ; do mkdir $DIR_VIDEO_OUTPUT/$filename/M3U8/$p.seg ; (cd M3U8 ; m3u8-segmenter —input $DIR_VIDEO_OUTPUT/$filename/$p.ts —duration 7 —output-prefix $p.seg/$p —m3u8-file $p.m3u8 —url-prefix "") ; done

    3. And finally manualy the individual playlists are joined into one

      echo ’

      EXTM3U

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=264000,RESOLUTION=416x234

      p1.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=464000,RESOLUTION=480x270

      p2.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=664000,RESOLUTION=640x360

      p3.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1264000,RESOLUTION=640x360

      p4.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1864000,RESOLUTION=960x540

      p5.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2564000,RESOLUTION=960x540

      p6.m3u8

      EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=4564000,RESOLUTION=1280x720

      p7.m3u8’ >> $filename.m3u8
      cd "$DIR_VIDEO_OUTPUT/$filename"/
      sudo rm *.ts

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