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  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • 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 (...)

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  • Live encoding with FFmpeg , decklink and pipe [duplicate]

    5 novembre 2016, par SKALIS

    This question already has an answer here :

    What is the best way to get live video input from a Blackmagic Decklink card and get it encoded with an external encoder (NvEncoder)

    I try :

    mkfifo output.yuv 
    
ffmpeg  -f decklink  -r 30000/1000 -pix_fmt uyvy422  -i "DeckLink Mini Recorder 4K@24"  output.yuv 
    
& NvEncoder -i output.yuv -pix_fmt yuv420p -bitrate 21M -fps30 output.ts

    Problem seems that the NvEncoder cannot take the uyvy422 format, so can I change that to yuv420p when capturing and before sending it trough the pipe ?

    The decklink card only can give me uyvy422

  • FFmpeg : convert mono interleaved 96 KHz stream to a stereo 48 KHz stream [closed]

    8 mars 2024, par Jochen

    I am using avfoundation with ffmpeg to capture audio with an HDMI-to-USB capture card from a MS2109 chip.

    


    The problem is that this card produces audio as 96Khz ; stereo 16bit 48kHz interleaved (1 sample for left channel, then 1 sample for right channel, alternating).

    


    There is a macOS program available : mono-to-stereo-mac.
This does the conversion and outputs it to a Blackhole virtual device, but it does not work perfectly as it produces crackling sounds.

    


    Is there a possibility to do this efficiently with FFmpeg ?
I came across this command :

    


    ffmpeg -f avfoundation -i :1 -filter_complex "[0:a:0]asetnsamples=1:false,aselect=n=2:e=mod(n\,2)+1[even][odd];[even]asetrate=48000,asetnsamples=1024,asetpts=N/SR/TB[even];[odd]asetrate=48000,asetnsamples=1024,asetpts=N/SR/TB[odd];[even][odd]join=2:stereo:0.0-FL|1.0-FR[aout]" -map "[aout]" 48kHz_stereo.wav


    


    but it does not produce the correct result.

    


  • ffmpeg Produces unplayable MP4 File From avi files

    25 août 2021, par Manngo

    A have a hand full of .avi files which I would like to convert to .mp4. Cobbling together everything I have found on the Internet, I end up with something like this :

    


    ffmpeg -i something.avi -c:v copy -c:a copy something.mp4


    


    What I get is playable on VLC player, but, of course, that will play anything I through at it. However, I cannot play it using QuickLook in the Finder or with the QuickTime player.

    


    In some cases I get video, but no sound. In some other cases I get garbled video.

    


    I am guessing that the audio or video codec inside the .avi file is incompatible with MacOS, and that the copy instruction above is not appropriate. In that case I guess that I would actually need to reencode the audio or video.

    


    If this sounds incoherent, I admit I know very little about video files.

    


    What would be the best settings to try to produce an MP4 which works natively on MacOS ?

    


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