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Autres articles (77)

  • 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

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

Sur d’autres sites (9754)

  • How to scale and add correct a logo in ffmpeg command ?

    24 mars 2016, par Chris

    I am trying to apply a watermark and also to scale it to the current video size via ffmpeg command :

    Here is my inital comand that works without watermark

    ffmpeg -v 0 -vcodec h264_qsv -i 'udp://@some.ip:1234?fifo_size=1000000&overrun_nonfatal=1&buffer_size=1000000' -vf scale=iw:ih -profile baseline -acodec aac -ac 1 -ar 44100 -ab 64k -deinterlace -vcodec h264_qsv -bufsize 4000k -maxrate 3500k -preset veryfast -vb 2000k -f flv rtmp://127.0.0.1/app/720

    Now I tried to add the picture as a watermark. There was a conflict while using with -vf scale=-1:ih*.5, in order to eliminate the problem I used -s 1280x720 to specify the resolution for the video stream, it worked but not properly.

    ffmpeg -v 0 -vcodec h264_qsv -i 'udp://@some.ip:1234?fifo_size=1000000&overrun_nonfatal=1&buffer_size=1000000' -i logo.png -filter_complex "overlay=10:10" -s 1280x720 -profile baseline -acodec aac -ac 1 -ar 44100 -ab 64k -deinterlace -vcodec h264_qsv -bufsize 4000k -maxrate 3500k -preset veryfast -vb 2000k -f flv rtmp://some.ip/app/720

    The problem :

    How can I specify in the ffmpeg command the both sizes of video and logo(watermark) so they don’t conflict with each other and they auto adjust like -vf scale=-1:ih*.5 dose.

    Thank you !

  • The duration of movie file recorded by AVAssetWriter is not correct

    1er mars 2016, par ideawu

    I am recording video files with AVAssetWriter combining with AVCaptureVideoDataOutputSampleBufferDelegate. So I can take control over every frame the camara gives in the method :

    - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{
    
    double time = CMTimeGetSeconds(CMSampleBufferGetPresentationTimeStamp(sampleBuffer));
    
    NSLog(@"%f", time);
    
    [_videoInput appendSampleBuffer:sampleBuffer];
    
}

    So I am so sure how many samples have been written to AVAssetWriter via AVAssetWriterInput, and I know exactly the start time and end time of the samples being written. The duration is calculated by end_time - start_time. Say the duration calculated in the video capture programm is 0.5 second.

    I get the .mov/.mp4 file on disk, inspected with ffmpeg -i, it shows a very different duration.

    ffmpeg -i m003.mp4 2>&1 | grep Dura
    
  Duration: 00:00:01.37, start: 0.836667, bitrate: 95 kb/s

    The movie file show a duration of 1.37 seconds, which it’s quite different with the EXACT duration 0.5.

    Does any one knows the reason ?

  • fft : ppc : Place ff_fft_calc_interleave_altivec() under correct ifdefs

    30 janvier 2016, par Diego Biurrun
    fft : ppc : Place ff_fft_calc_interleave_altivec() under correct ifdefs

    Also fix #endif comments in the FFT init code.
    • [DBH] libavcodec/ppc/fft_altivec.S
    • [DBH] libavcodec/ppc/fft_init.c

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