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  • 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 (...)

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

    31 janvier 2010, par

    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 (...)

  • 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 (6044)

  • Add PNG image overlay to video starting with non-key frame

    8 mai 2020, par RamRick

    Alright, so I'm trying to edit a bunch of short to very long videos.
The goal is to mute a 1 minute part within each video and overlay that small part with a PNG image for the full duration.

    



    Because this all has to be done as fast as possible, I figured it would be the best idea to split every video into 3 parts, then mute and add the overlay to part #2 and put all 3 parts back together.

    



    The first problem I ran into was that part #2 and #3 always started with a 1-2 second freeze in video, while the audio was fine.

    



    I found out that this was caused by me cutting at key frames and ignoring non-key frames at the beginning.

    



    I fixed that by adding the -copyinkf parameter to also copy all non-key frames, like so :

    



    ffmpeg -i "in.mp4" \
-to 0:04:00 -c:v copy -c:a copy -copyinkf "p1.mp4" \
-ss 0:04:00 -to 0:05:00 -c:v copy -c:a copy -copyinkf "p2.mp4" \
-ss 0:05:00 -c:v copy -c:a copy -copyinkf "p3.mp4"


    



    So I went on and proceeded to mute part #2, like so :

    



    ffmpeg -i "p2.mp4" -af "volume=0" -c:v copy -copyinkf "p2_muted.mp4"


    



    All fine until this point, and IF I put the parts back together right now it would also be quick and accurate, like so :

    



    --parts.txt
file 'p1.mp4'
file 'p2_muted.mp4'
file 'p3.mp4'

ffmpeg -f concat -safe 0 -i parts.txt -c copy "out.mp4"


    



    But now comes the problem :

    



    Since I have to re-encode part #2 to overlay the PNG image, I get the 1-2 seconds freeze frame problem at the beginning again and I can't for the life of me figure out the "equivalent" of -copyinkf for re-encoding a video.

    



    Right now I'm overlaying the PNG image like so :

    



    ffmpeg -i "p2_muted.mp4" -i "../banner.png" -filter_complex "[1][0]scale2ref[i][v];[v][i]overlay" -c:a copy "p2_edited.mp4"


    



    So my question is, what would the equivalent to -copyinkf be, or in case there is a better way than mine, what would that be to achieve my task.

    


  • Split a video with ffmpeg, without reencoding, at timestamps given in a txt file

    16 février, par Basj

    Let's say we have a video input.mp4, and a file split.csv containing :

    


    start;end;name
00:00:27.132;00:07:42.422;"Part A.mp4"
00:07:48.400;00:17:17.921;"Part B.mp4"


    


    (or I could format the text file in any other format, but the timestamps must be hh:mm:ss.ddd)

    


    How to split the MP4 into different parts with the given start / end timestamps, and the given filename for each part ?

    


    Is it possible directly with ffmpeg, and if not with a Python script ?

    


  • Using FFmpeg from .NET

    31 août 2011, par Lieven Cardoen

    I have been searching for an hour on how to use FFmpeg from .NET and it seems you need to execute the FFmpeg.exe with a Process to get things done. To get a duration of an flv file for instance, you would need to start using grep to get something back out of cmd window. It all seems complicated... + you'd have to start installing things on remote servers (@ customers)...

    Is there another way ? Aren't there dll's containing the FFmpeg logic ? Other solutions to get some information out of flv files in .NET ?

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