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  • XMP PHP

    13 mai 2011, par

    Dixit Wikipedia, XMP signifie :
    Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
    Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
    XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • 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 (...)

Sur d’autres sites (8916)

  • Preserving video details for ssim in ffmpeg windows [closed]

    4 juillet 2024, par Dharik Arsath

    How to record screen in ffmpeg so to compare with original and recorded video with ssim. this looks a simple tasks but when recording ffmpeg is dropping and duplicating frames and so it does not match frame to frame on original video. though duplicate is around 100 and drop is around 0 to 30, I see sometimes ssim gives high score but another time it does not. when i checked there was a delay of few milliseconds which can be hardly seen on naked eye.

    


    Note : In ubuntu with nvidia it works fine, problem is on windows only (intel gpu)

    


    command I am using is same for ubuntu and windows only gdigrab and x11grab changed. and preserving most information like recording at same fps of original video, using same pixfmt yuv420

    


  • How to convert audio files without changing bitrate using FFMPEG ? [duplicate]

    1er avril 2021, par Abraham Arnold

    I am converting MP3 file to WAV and I am using following code.

    


    ffmpeg -i input.mp3 -acodec pcm_s16le -ac 1 -ar 16000 output.wav


    


    So the original input.mp3 bitrate is 128kbps and when converted the output.wav file bitrate is 256kbps. I need the output file to be also keep same bitrate as original without changing it. I tried many ways. But I wasn't able to do that. I need some proper way to keep the original file bitrate value with output file. Anybody can help me ? Thanks in advance.

    


  • FFMPEG replace video audio with filter_complex

    21 février 2017, par Chintan7027

    I wants such a output video where audio of output is created using ffmpeg -filter_complex mechanism,

    /usr/local/Cellar/ffmpeg/3.2.2/bin/ffmpeg 
    
-i /uploads/videos/1487684390-lg9htt0RW2.mov 
    
-i /uploads/audios/1487664761-SCPbo6Tkac.mp3 
    
-filter_complex "
    
[0:a]atrim=0:8.70824980736,asetpts=PTS-STARTPTS[aud1]; 
    
[1:a]atrim=0:12.9567301273,asetpts=PTS-STARTPTS[aud2];
    
[0:a]volume=0.3,atrim=start=8.70824980736:21.6649799347,asetpts=PTS-STARTPTS[slow_aud]; 
    
[aud2][slow_aud] amerge=inputs=2[a_merged];
    
[0:a]atrim=start=21.6649799347:31.6410098076 [remaining_audio]; 
    
[aud1][a_merged][remaining_audio]concat=n=3:v=0:a=1[aout]" 
    
-map 0:v -map "[aout]" -c:v copy -acodec mp3 
    
/uploads/output/1487684390-lg9htt0RW2.mov

    Original Audio Recorded Based On UTC timestamp Vs Original Video Recorded Based on UTC timestamp

                13:00-------- Original Event Audio -------- 13:20
    
       12:50------------- Event Video Recorded --------------13:30

    This is my requirement

    So the audio of the output video should contains

    1. First 10 seconds(12:50 - 13:00) are Audio of Event Video Recorded
    2. Next 20 seconds (13:00 -13:20) are merged audio(Original Audio+ Original Video where Original video’s audio volume is .3)
    3. Remaining 10 seconds(13:21-13:30) of video will play remaing audio of video

    What I am getting by above commands

    1. First 10 seconds(12:50 - 13:00) are Audio of Event Video Recorded Achieved
    2. Next 20 seconds (13:00 -13:20) are merged audio(Original Audio+ Original Video where Original video’s audio volume is .3) Achieved
    3. Remaining 10 seconds(13:21-13:30) of video will play remaining audio of video Not Achieved

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