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  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

Sur d’autres sites (3169)

  • ffmpeg can loop png but not audio

    14 avril 2022, par codingmaster398

    I'm using the following to stream an image to YouTube :

    


    ffmpeg -threads:v 2 -threads:a 8 -filter_threads 2 -thread_queue_size 1080 \
-loop 1 -re -i ./image.png \
-i ./track.mp3 \
-pix_fmt yuv420p -c:v libx264 -qp:v 19 -profile:v high -rc:v cbr_ld_hq -level:v 4.2 -r:v 60 -g:v 120 -bf:v 3 -refs:v 16 -preset fast -f flv rtmp://a.rtmp.youtube.com/live2/xxx


    


    And the looping for the image (to keep it streaming over) works, but not the sound.

    


  • flush encoded packets to disk when muxing audio and video

    23 juin 2016, par chandu

    I am using muxing.c example (without any modifications) provided with ffmpeg 3.0 version to create MP4 file (H.264 & AAC) with VS 2013. The sample is working fine with default width & height for video. But when changed the width to 1920 and height to 1080, sample is taking nearly 400MB (using task manager & in Release mode) through out the program and also never writing the encoded packets to the out file. It is writing to the out file (out.mp4) only when calling avcodec_close() at the end.

    I have tried to

    1. free the encoded packet after calling write_frame().
    2. used avio_flush()
    3. used avcodec_flush_buffers()

    but no success.

    Could anybody please tell me, how can I save the every encoded packet to disk by not keeping in RAM, so the memory usage would be low ?

    Note : There is no issue with flushing the buffers after recording is over, I am doing this by calling av_interleaved_write_frame() with AVPacket NULL.

  • Webcam streaming from Mac using FFmpeg

    22 juillet 2016, par Galaxy

    I want to stream my webcam from Mac using FFmpeg.

    First I checked the supported devices using ffmpeg -f avfoundation -list_devices true -i ""

    Output :

    [AVFoundation input device @ 0x7fdf1bd03000] AVFoundation video devices:
    
[AVFoundation input device @ 0x7fdf1bd03000] [0] USB 2.0 Camera #2
    
[AVFoundation input device @ 0x7fdf1bd03000] [1] FaceTime HD Camera
    
[AVFoundation input device @ 0x7fdf1bd03000] [2] Capture screen 0
    
[AVFoundation input device @ 0x7fdf1bd03000] [3] Capture screen 1
    
[AVFoundation input device @ 0x7fdf1bd03000] AVFoundation audio devices:
    
[AVFoundation input device @ 0x7fdf1bd03000] [0] Built-in Microphone

    The device[0] is the webcam I want to use.

    Then I tried to capture the webcam using ffmpeg -f avfoundation -i "0" out.mpg

    Output :

    [avfoundation @ 0x7fe7f3810600] Selected framerate (29.970030) is not supported by the device
    
[avfoundation @ 0x7fe7f3810600] Supported modes:
    
[avfoundation @ 0x7fe7f3810600]   320x240@[120.101366 120.101366]fps
    
[avfoundation @ 0x7fe7f3810600]   640x480@[120.101366 120.101366]fps
    
[avfoundation @ 0x7fe7f3810600]   800x600@[60.000240 60.000240]fps
    
[avfoundation @ 0x7fe7f3810600]   1024x768@[30.000030 30.000030]fps
    
[avfoundation @ 0x7fe7f3810600]   1280x720@[60.000240 60.000240]fps
    
[avfoundation @ 0x7fe7f3810600]   1280x1024@[30.000030 30.000030]fps
    
[avfoundation @ 0x7fe7f3810600]   1920x1080@[30.000030 30.000030]fps
    
[avfoundation @ 0x7fe7f3810600]   320x240@[30.000030 30.000030]fps
    
[avfoundation @ 0x7fe7f3810600]   640x480@[30.000030 30.000030]fps
    
[avfoundation @ 0x7fe7f3810600]   800x600@[20.000000 20.000000]fps
    
[avfoundation @ 0x7fe7f3810600]   1024x768@[6.000002 6.000002]fps
    
0: Input/output error

    After that, I tried stream this webcam from my Mac using ffmpeg -f avfoundation -framerate 30 -i "0" -f mpeg1video -b 200k -r 30 -vf scale=1920:1080 http://127.0.0.1:8082/

    Output :

    [avfoundation @ 0x7f8515012800] An error occurred: The activeVideoMinFrameDuration passed is not supported by the device.  Use -activeFormat.videoSupportedFrameRateRanges to discover valid ranges.0: Input/output error

    I cannot capture or stream this webcam. However when I used the Facetime camera instead of this webcam, everything was OK. I’ve been searching for this problem for a few days, but still cannot fix it. Does anyone have experience with webcam and FFmpeg on Mac ?

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