Recherche avancée

Médias (2)

Mot : - Tags -/documentation

Autres articles (70)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (6954)

  • FFmpeg accurate speed for x11grab

    21 mars 2017, par Peter Shaw

    Hi I am trying to make a screencast in realtime with ffmpeg on Linux.

    This is my call :

    ffmpeg \
    
-f x11grab \
    
-s 1920x1080 \
    
-r 24 -framerate 24 \
    
-i $DISPLAY \
    
-preset ultrafast \
    
-tune zerolatency \
    
-pix_fmt yuv420p \
    
-acodec copy \
    
-vcodec libx264 \
    
-b:v 500k \
    
-crf 0 \
    
-threads 0 \
    
-y /data/production/out.mkv \
    
-an \
    
-t $LEN

    As far as i can tell this is near accurate and has a decent quality. Maybe there is a better settling, than let me please know.

    As the screen will be captured the timing is not correct. I get a message with something like this :

    frame=  901 fps= 22 q=0.0 size=   66553kB time=00:00:37.50 bitrate=14538.3kbits/s speed=0.905x  

    The Speed will turn around from 0.600x to 1.200x and is never stable to 1x.
    I wonder if it’s possible to get a accurate timing.
    I have to do a 60sec movie that is in speed exactly 100% like the frame-buffer is. Is it possible ?

  • Is there a way to speed up audio processing (amix and adelay) in FFMPEG ?

    30 mars 2017, par Nadir

    I’m using, in android application, many ffmpeg amix and adelay filter commands over very small mp3 files (not longer than 3 seconds).
    Unfortunately each adelay or amix command takes between 2 and 4 seconds to execute, which is a lot considering that I should run the same operation for a lot of files.
    Here are two example of commands I’m running :

    amix :

    [-i, input1.mp3, -i, input2.mp3, -filter_complex, amix=inputs=2:duration=longest:dropout_transition=0,dynaudnorm=f=100[aout], -map, [aout], -ac, 2, -c:a, libmp3lame, -q:a, 4, output.mp3]

    adelay :

    [-i, input3.mp3, -filter_complex, [0:a]adelay=1|1, -c:a, libmp3lame, output1.mp3]

    I know in video there is an option (-preset ultrafast) to make the execution faster, is there a way to do the same for audio ?

  • can we runtime change video playback speed using ffmpeg ? [closed]

    17 février 2021, par vbv_at_gd

    I am trying to create video player application which has one feature that change runtime playback speed for example if user set playback speed (using seekbar value) then video play in slow-motion of fast forward for that particular time.

    


    But FFMPEG create new video and so i want to avoid new video creation every time.

    


Navigation