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Autres articles (19)

  • 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 (...)

  • Les images

    15 mai 2013

  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

Sur d’autres sites (1805)

  • I Need Help Making Our FIRST Robotics Competition Driver Station Video Feed Faster [closed]

    30 mars, par Joshua Green

    I am currently using FFmpeg on a Raspberry Pi 4 Model B using an ArduCam UC-844 Rev. B as the camera. We do not need any audio and I don't care about the quality of the video. All we need is for the stream to be as fast as possible. The video from the camera is being streamed to the driver station via FFmpeg and being picked up on the driver station via FFplay. Right now we are getting a delay that we wish could go away or be significantly shortened. These are the commands we are using.

    


      


    • Raspberry Pi : ffmpeg -i /dev/video0 -c:v libx264 -crf 45 -maxrate 1M -bufsize 1.2M -preset ultrafast -tune zerolatency -filter:v fps=30 -f mpegts -omit_video_pes_length 0 udp://10.2.33.5:554

      


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    • Driver Station : ffplay -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration 0 -f mpegts -vf setpts=0 udp://10.2.33.5:554

      


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  • lavu/frame : add QP side data

    1er mars 2018, par wm4
    lavu/frame : add QP side data

    This adds a way for an API user to transfer QP data and metadata without
    
having to keep the reference to AVFrame, and without having to
    
explicitly care about QP APIs. It might also provide a way to finally
    
remove the deprecated QP related fields. In the end, the QP table should
    
be handled in a very similar way to e.g. AV_FRAME_DATA_MOTION_VECTORS.
    

    There are two side data types, because I didn't care about having to
    
repack the QP data so the table and the metadata are in a single
    
AVBufferRef. Otherwise it would have either required a copy on decoding
    
(extra slowdown for something as obscure as the QP data), or would have
    
required making intrusive changes to the codecs which support export of
    
this data.
    

    The new side data types are added under deprecation guards, because I
    
don't intend to change the status of the QP export as being deprecated
    
(as it was before this patch too).
    • [DH] doc/APIchanges
    • [DH] libavutil/frame.c
    • [DH] libavutil/frame.h
    • [DH] libavutil/version.h
    • [DH] tests/ref/fate/exif-image-embedded
    • [DH] tests/ref/fate/exif-image-jpg

  • I Need Help Making Our Driver Station Video Feed Faster [closed]

    30 mars, par Joshua Green

    I am currently using FFmpeg on a Raspberry Pi 4 Model B using an ArduCam UC-844 Rev. B as the camera. We do not need any audio and I don't care about the quality of the video. All we need is for the stream to be as fast as possible. The video from the camera is being streamed to the driver station via FFmpeg and being picked up on the driver station via FFplay. Right now we are getting a delay that we wish could go away or be significantly shortened. These are the commands we are using.

    


      


    • Raspberry Pi : ffmpeg -i /dev/video0 -c:v libx264 -crf 45 -maxrate 1M -bufsize 1.2M -preset ultrafast -tune zerolatency -filter:v fps=30 -f mpegts -omit_video_pes_length 0 udp://10.2.33.5:554

      


      • 


    • Driver Station : ffplay -fflags nobuffer -flags low_delay -probesize 32 -analyzeduration 0 -f mpegts -vf setpts=0 udp://10.2.33.5:554

      


      • 


    


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