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Autres articles (112)

  • 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

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (5171)

  • The real time compression with ffmpeg [on hold]

    14 avril 2015, par midrel

    I am working on a project that will make real time video compression. All images come from camera and are stored in the RAM at a rate of 30 fps.

    I want to use FFmpeg to compress it image by image and to transmit either to RAM or anywhere.

    Could somebody help me please ?

  • Getting accurate time from FFMPeg with Objective C (Audio Queue Services)

    2 avril 2012, par Winston

    My iPhone app plays an audio file using FFMPeg.

    I'm getting the elapsed time (to show to user) from the playing audio (in minutes and seconds after converting from microseconds, given by FFMPeg) like so :

    AudioTimeStamp currentTimeStamp;
    
AudioQueueGetCurrentTime (audioQueue, NULL, &currentTimeStamp, NULL);
    

    
getFFMPEGtime = currentTimeStamp.mSampleTime/self.basicAudioDescription.mSampleRate;
    

    
self.currentAudioTime = [NSString stringWithFormat: @"%02d:%02d",
    
                            (int) getFFMPEGtime / (int)60000000,
    
                            (int) ((getFFMPEGtime % 60000000)/1000000)];

    Everything works fine, but when I scrub back or forward to play another portion of the song, the elapsed time will go back to zero, no matter the current position. The timer will always zero out.

    I know I'm suposed to do some math to keep track of the old time and the new time, maybe constructing another clock or so, perhaps implementing another callback function, etc... I'm not sure what way I should go.

    My questions are :

    1) What's the best approach to keep track of the elapsed time when going back/forward in a song, avoiding the clock to always going back to zero ?

    2) Should I look deeply into FFMPeg functions or should I stick with Objective-C and Cocoa Touch for solving this problem ?

    Please, I need some advices/ideas from experienced programmers. I'm stuck. Thanks beforehand !

  • FFMPEG filter_complex_script cropping by time

    29 mars 2018, par D_Corson

    I am trying to use FFMPEG’s filter_complex_script option to crop a video in different places depending on the time. I have a file that shows the bounding box of where an object should be and have written a text file called "myscript.txt" that has commands as follows :

    crop=x=125:y=190:w=105:h=98
    
crop=x=124:y=193:w=106:h=99
    
crop=x=124:y=194:w=106:h=99

    My command line call for ffmpeg is

    ffmpeg -y -i input.mp4 -filter_complex_script "myscript.txt" -c:v libx264 output.mp4

    This will run fine and produce an output, but the crop window only uses the first line of the file and does not change over time. Currently I have cropping details at the frame level but I can find a way to make this work by second if there is a solution out there.

    I am running FFMPEG version 3.4.1 on windows 10.

    Thank you !

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