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Sur d’autres sites (7279)

  • avformat/mov_chan : do not assume channels are in native order

    29 janvier 2024, par Marton Balint
    avformat/mov_chan : do not assume channels are in native order

    Existing code could have caused wrong channel order signalling or reduced
    
channel count if a channel designation appeared multiple times. This is
    
actually an old bug, but the conversion to the new channel layout API made it
    
visible, because now the code overrides the proper channel count with the one
    
calculated from the mask.
    

    Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavformat/mov_chan.c

  • Revision f5209d7e01 : Remove rate component adjustment for AQ1 In AQ1 a rate adjustment was applied f

    21 novembre 2014, par Paul Wilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_encodeframe.c



    Remove rate component adjustment for AQ1

    In AQ1 a rate adjustment was applied for blocks coded with a
    deltaq. This tends to skew the partition selection and cause
    rate overshoot.

    For example, consider a 64x64 super block where some but not all
    sub blocks are in a low q segment and some are in a high q segment.
    The choice of Q when considering large partition and transform sizes
    is defined by the lowest sub block segment id (currently this implies the
    lowest Q). If some parts of the larger partition are very hard this will
    cause a high rate component.

    The correct behavior here is for the rd code to discard the large partition
    choice and break down to sub blocks where some have low and some
    have high Q. However the rate correction factor above mask the high
    cost of coding at a larger partition size.

    Change-Id : Ie077edd0b1b43c094898f481df772ea280b35960

  • avcodec/wavpackenc : add support for encoding unspec channel layouts

    14 août 2023, par Paul B Mahol
    avcodec/wavpackenc : add support for encoding unspec channel layouts

    Also write 0 for chmask if mask have bits outside of first 32 bits,
    
as wavpack does not support more bits than 32 for channel layouts.
    • [DH] libavcodec/wavpackenc.c

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