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    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
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    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
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  • De l’upload à la vidéo finale [version standalone]

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Sur d’autres sites (8556)

  • FFmpeg streaming low CRF results in low quality

    12 août 2019, par Max Paython

    I am streaming(live chat) with FFmpeg using the following parameters.

    ffmpeg -f dshow -rtbufsize 100M -i video="device":audio="device" \
    
-c:v libx264 -crf 30 -preset ultrafast -tune zerolatency \
    
-c:a aac -f mpegts udp://127.0.0.1:1234

    Unexpectedly, when CRF is lowered from 30 to 20, step-by-step. The stream quality decreases dramatically. When the CRF is about 20, sudden changes in the picture (like a head movement), seems to make the image green, gray or very distorted. I tried using CRF 30, and the problems seems to be gone. Why is this happening ?

    I don’t think it is a bandwidth issue given that I am on localhost. Also I didn’t change anything based on I-frames.

    Edit : I checked the file sizes given CRF 20 and CRF 30 on libx265.

    10 Second video.

    CRF 20 : 1.7M

    CRF 30 : 350kb

    Is 1.7M really bad for a 10 second stream that localhost or any other live streaming sevice can’t handle ?

  • Streaming to YouTube from DJI-SDK

    6 avril 2017, par d0n13

    I’m trying to figure out how to take the camera frames in the DJI-SDK and push them to some form of encode so that I can create a live stream for YouTube.

    Has anybody got this working ? I understand most people use FFmpeg for streaming but my understanding is basic enough on how that project works.

    I’d love if somebody could share some resources on how we could go about getting this to work. I’ve seen the question on the web but I’ve found nothing that comes close to getting a solution for this.

    I need it for a project and there is a commercial solution available but it’s expensive and I can’t afford it and I’d be happy enough to code this if I can understand how to go about it and maybe get some help.

    I’d be happy enough to make an open source version of this is anyone can help.

    Thanks guys, hope we can make this...
    Donie

  • What are the other alternatives to FFMPEG for encoding and very low latency streaming ? [closed]

    23 septembre 2020, par Hamza Ghizaoui

    So the situation as following : I m receiving images on the fly from a camera, BMP format 4000x3000 pixel, encoding them into h264 or h265, and then streaming the result via HTTP and/or UDP.
The whole process must take no more than 30 ms.

    


    I used FFMPEG with hardware acceleration as a start and it seems to deliver. There is doubt among our team that it is the best solution. and I wanna be absolutely sure that it is before I defend it openly :D

    


    would be glad to hear your takes on this :)

    


    Best regards

    


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