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  • La sauvegarde automatique de canaux SPIP

    1 April 2010, by

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

  • HTML5 audio and video support

    13 April 2011, by

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • De l’upload à la vidéo finale [version standalone]

    31 January 2010, by

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier; La génération d’une vignette : extraction d’une (...)

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  • FFmpeg HLS streaming - Why the program date time of older segment changing when re-streaming after discontinuity

    9 November 2020, by Suriya Krish

    Following is the ffmpeg command to stream the data.

    


    ffmpeg -re -f avfoundation 
-framerate 30 -i 0 
-codec:v h264_videotoolbox -x264-params keyint=120:scenecut=0 
-codec:a copy -f hls 
-hls_list_size 60 
-hls_time 10 
-hls_flags delete_segments 
-hls_flags +append_list 
-hls_flags +discont_start 
-hls_flags +program_date_time 
-strftime 1 
-strftime_mkdir 1 
-hls_segment_filename 
'%Y%m%dT%H%M%S%z.ts' playlist.m3u8


    


    Following is the playlist.m3u8 content which generated for few seconds.

    


    #EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-DISCONTINUITY
#EXT-X-DISCONTINUITY
#EXTINF:10.000000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:07:53.000+0530
20201109T220753+0530.ts
#EXTINF:10.000000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:08:03.000+0530
20201109T220803+0530.ts
#EXT-X-ENDLIST


    


    When the re-stream happens(in case of restarting the streaming service), the program date time of older segments(before #EXT-X-DISCONTINUITY) also get changed like below, which is unexpected.

    


    #EXTM3U
#EXT-X-VERSION:3
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-DISCONTINUITY
#EXT-X-DISCONTINUITY
#EXTINF:10.000000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:12:50.633+0530
20201109T220753+0530.ts
#EXTINF:10.000000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:13:00.633+0530
20201109T220803+0530.ts
#EXT-X-DISCONTINUITY
#EXTINF:10.000000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:13:12.000+0530
20201109T221312+0530.ts
#EXTINF:5.400000,
#EXT-X-PROGRAM-DATE-TIME:2020-11-09T22:13:22.000+0530
20201109T221322+0530.ts
#EXT-X-ENDLIST


    


    Why the program date time of older segment should change? Should we add any arguments in ffmpeg command to handle this?

    


  • doc/muxers.texi: fix build issue for unknown command

    18 April 2021, by Guo, Yejun
    doc/muxers.texi: fix build issue for unknown command

    The build log:
    
** Unknown command `@code' (left as is) (in src/doc/muxers.texi l. 2020)
    
*** '' without macro. Before: -map option with the ffmpeg CLI tool. (in src/doc/muxers.texi l. 2020)
    
*** '' without opening '' before:  option with the ffmpeg CLI tool. (in src/doc/muxers.texi l. 2020)
    • [DH] doc/muxers.texi

  • avcodec/proresenc_anatoliy: support for more color matrix for proresenc

    5 November 2019, by Limin Wang
    avcodec/proresenc_anatoliy: support for more color matrix for proresenc

    Please tested with below command:
    
./ffmpeg -i ../fate-suite/mpeg2/t.mpg  -c:v prores_aw -color_primaries bt2020 -colorspace bt2020_ncl -color_trc smpte2084 -an output.mov
    

    mediainfo outout.mov
    
...
    
Color primaries                          : BT.2020
    
Transfer characteristics                 : PQ
    
Matrix coefficients                      : BT.2020 non-constant
    

    ./ffmpeg -i ../fate-suite/mpeg2/t.mpg  -c:v prores_aw -color_primaries bt2020 -colorspace bt2020_ncl -color_trc arib-std-b67 -an output.mov
    
mediainfo outout.mov
    
...
    
Color primaries                          : BT.2020
    
Transfer characteristics                 : HLG
    
Matrix coefficients                      : BT.2020 non-constant
    

    Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
    • [DH] libavcodec/proresenc_anatoliy.c

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