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  • Revision effd974b16 : Limit arf interval for low fpf clips. This patch limits the maximum arf interv

    16 avril 2015, par paulwilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_firstpass.c


     Modify /vp9/encoder/vp9_ratectrl.c



    Limit arf interval for low fpf clips.

    This patch limits the maximum arf interval length to
    approximately half a second. In some low fps animations in
    particular the existing code was selecting an overly long interval
    which was hurting visual quality. For a sample problem test clip
    (360P animation , 15fps, 200Kbit/s) this change also improved
    metrics by >0.5 db.

    There may be some clips where this hurts metrics a little, but the
    worst case impact visually is likely to be less than having an
    interval that is much too long. On more normal material at 24
    fps or higher, the impact is likely to be nil/minimal.

    Change-Id : Id8b57413931a670c861213ea91d7cc596375a297

  • avfilter/vf_datascope : reduce block height

    11 septembre 2018, par Paul B Mahol
    avfilter/vf_datascope : reduce block height

    So it match minimal input video size requirement.
    • [DH] libavfilter/vf_datascope.c

  • lavu/tx : generalize MDCTs

    10 septembre 2022, par Lynne
    lavu/tx : generalize MDCTs

    The same code can perform any-length MDCTs with minimal changes.
    • [DH] libavutil/tx_template.c

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