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Autres articles (30)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • HTML5 audio and video support

    13 avril 2011, par

    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 (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (5543)

  • FFMPEG Convert TS file to 1280x720 MPEG2 and retain subtitles

    6 mai 2019, par Brandon W

    I am using FFMPEG on Centos (CLI) and i am trying to convert a TS file which is 1920x1080 resolution to 1280x720 and retain the subtitles.

    I have been able to accomplish part of this by running the command

    fmpeg -i Brandon-Test-file.ts -map 0:0 -map 0:1 -map 0:1 -map 0:2 -c:v copy -c:a:0 libmp3lame -b:a:0 128k -c:a:1 libfaac -b:a:1 96k -c:s copy output.mpg

    ^^ this code will covert the file to mpeg2 but at the 1920x1080 and with subtitles.

    If i remove the -c:v copy (codec copy) and replace it with -vf scale=-1:720 then it will convert with my specifications but without the subtitles.

  • FFMPEG - 2-pass video conversion final file size is larger than expected

    14 juin 2022, par Kevin Korb

    We are converting files and the target filesize is important. For one version of the video it can not be above 750KB.

    


    We are using the 2-pass encoding and specifying the target audio bitrate and target video bitrate, however the longer the duration of the video, the larger the file becomes and exceeds our 750KB target.

    


    


    For example, our file is 53.3 seconds, we know our final target of
750KB. We like our audio at 48kbps (mono).

    


    So we calculate our target (total) bitrate at : 750*8/53.3 = 112.57
total kbps Audio bitrate = 48kbps Video bitrate = 112-48 = 64kbps
video

    


    We would expect the file produced to be 746.2KB. (112*53.3 / 8)

    


    The file produced is 850k(ish).

    


    


    Is there something that takes up space in the file that isn't video or audio that we need to take into consideration ?

    


  • FFmpeg synthesizes multiple videos, the final result is only sound, no picture display

    6 juillet 2023, par Halifax

    1、I first converted mp4 to ts:

    


    -i MyVideo.mp4 -vcodec copy -acodec aac -b:v 10000k MyVideo.ts


    


    2、Then scale the ts and fill the empty space:

    


    -i MyVideo.ts -vf pad=width=iw:height=ih:x=-1:y=0:color='White' -b:v 10000k MyVideo_transform.ts


    


    3、Finally use concat to merge into mp4 files:

    


    -i "concat:MyVideo_transform1.ts|MyVideo_transform2.ts" -acodec copy -vcodec copy -absf aac_adtstoasc -b:v 10000k $outputFilePath"


    


    Finally use concat to merge into mp4 files。

    


    I hope that the final merged result can see the video picture。