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Autres articles (93)

  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

Sur d’autres sites (10828)

  • huffyuvdec : implement trick

    3 juin 2014, par Christophe Gisquet
    huffyuvdec : implement trick

    When the joint table does not contain a valid entry, the decoding restarts
    
from scratch. By implementing the trick of jumping to the 2nd level of the
    
individual table (and inlining the whole), a speed improvement of 5-10%
    
is possible.
    

    On a 1000-frames YUV4:2:0 video, before :
    
362851 decicycles in 422, 262094 runs, 50 skips
    
182488 decicycles in gray, 262087 runs, 57 skips
    
Object size : 23584
    
Overall time : 8.377
    

    After :
    
346800 decicycles in 422, 262079 runs, 65 skips
    
168197 decicycles in gray, 262077 runs, 67 skips
    
Object size : 23188
    
Overall time : 7.878
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/huffyuvdec.c

  • avcodec/mediacodecdec : warn when input buffers are not configured with proper size

    5 septembre 2019, par Aman Gupta
    avcodec/mediacodecdec : warn when input buffers are not configured with proper size

    In rare circumstances, if the codec is not configured with the
    
proper parameters the input buffers can be allocated with a size
    
that's too small to hold an individual packet. Since MediaCodec
    
expects exactly one incoming buffer with a given PTS, it is not
    
valid to split data for a given PTS across two input buffers.
    

    See https://developer.android.com/reference/android/media/MediaCodec#data-processing:
    

      > Do not submit multiple input buffers with the same timestamp
    

    Signed-off-by : Aman Gupta <aman@tmm1.net>
    • [DH] libavcodec/mediacodecdec.c

  • fftools/ffmpeg_dec : abort if avcodec_send_packet() returns EAGAIN

    22 mai 2023, par James Almer
    fftools/ffmpeg_dec : abort if avcodec_send_packet() returns EAGAIN

    As the comment in the code mentions, EAGAIN is not an expected value here
    
because we call avcodec_receive_frame() until all frames have been returned.
    
avcodec_send_packet() returning EAGAIN means a packet is still buffered, which
    
hints that the underlying decoder is buggy and not fetching packets as it
    
should.
    

    An example of this behavior was in the libdav1d wrapper before f209614290,
    
where feeding it split frames (or individual OBUs) would result in the CLI
    
eventually printing the confusing "Error submitting packet to decoder : Resource
    
temporarily unavailable" error message, and just keep going until EOF without
    
returning new frames.
    

    Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] fftools/ffmpeg_dec.c

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