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Autres articles (39)

  • 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 (...)

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

Sur d’autres sites (6671)

  • FFmpeg - What muxer do i need to save an AAC audio stream

    1er mars 2017, par David Barishev

    I’m developing Android application, and im using ffmpeg for conversion of files.
    I want my binary file to be as slim as possible since i don’t have many input formats and output formats, and my operation is quite basic.And of course not to bloat the APK.

    In my program ffmpeg receives a file, and copys the audio stream (-acodec copy), the audio stream will always be aac (mp4a). What i need is to save the stream to file.
    My command looks like this : ffmpeg -i {Input} -vn -acodec copy output.aac.

    What muxer do i need to for muxing aac to file ? I have tried flv,mp3,mov but i always get
    Unable to find a suitable output format for 'output.aac', so these options are wrong.
    I don’t need an encoder for stream copy btw.

    Side note : this command work flawlessly on full installation of ffmpeg , but I don’t know which muxer it uses. If there is a way to output the muxer it uses from regular ffmpeg run, it would work too.

  • Record screen and save to .mp4 video

    10 avril 2023, par Freddy J

    I have created an animation in Pyglet and I want to save this animation as a video retaining the same quality as the Pyglet window. I attempt to use imageio and FFMPEG with Pyglet. See relevant snippets below.

    


    import numpy as np
import pyglet
import imageio.v2 as iio

writer = iio.get_writer("out.mp4")

@window.event
def on_draw():
    # Draw
    # ...

    # Capture frame
    color_buffer = pyglet.image.get_buffer_manager().get_color_buffer()
    image_data = buffer.get_image_data()
    buffer = image_data.get_data("RGBA", image_data.pitch)

    # 4 channels: RGBA
    frame = np.frombuffer(buffer).reshape((image_data.height, image_data.width, 4))
    writer.append_data(frame)


    


    Problem :

    


    buffer has expected size of window width * window height * 4.
    
However, np.frombuffer(buffer) has size buffer size / 8. I do not know why. I expect the size to be equal. Hence, the program fails at the reshape step.

    


  • arm : vp9itxfm : Avoid .irp when it doesn’t save any lines

    4 février 2017, par Martin Storsjö
    arm : vp9itxfm : Avoid .irp when it doesn’t save any lines

    This makes it more readable.
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavcodec/arm/vp9itxfm_neon.S

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