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  • ffmpeg : smooth, stable timelapse videos from normal speed videos

    18 mars 2015, par est

    For a one hour dash cam video in normal speed, is it possible to create a smooth timelapse video from it ?

    Most tutorials online I found about "timelapse + ffmpeg" are with static jpeg files combined into a timelapse video. These often result jiggle between frames, are the any specific parameters which would make the video looking very smooth & stable ?

    Should I just setpts=0.5*PTS for the trick ? Any must-have or little-known tricks ?

  • Revision 067fc49996 : Merge "Speed up non-rd mode decision search"

    19 mars 2015, par Jingning Han

    Merge "Speed up non-rd mode decision search"

  • Revision 83cbe22623 : Speed up non-rd mode decision search This commit makes the encoder to explicitl

    18 mars 2015, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_pickmode.c



    Speed up non-rd mode decision search

    This commit makes the encoder to explicitly calculate the SAD
    associated with the LAST_FRAME motion vector and compare it to
    that of the GOLDEN_FRAME given by integral projection motion
    estimation. It skips the expensive sub-pixel motion search over
    GOLDEN_FRAME when the LAST_FRAME can provide fairly good motion
    compensated prediction quality.

    For dark720p speed -6 single thread goes from
    33304 b/f, 40.070 dB, 18156 ms ->
    33319 b/f, 40.061 dB, 17611 ms

    Change-Id : I01bc94b9b598075567a392111046b97a9bc30efe

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