[FFmpeg-user] Blurry artefacts during playback

[Ingo Brückl]

After updating FFmpeg yesterday, I'm experiencing a huge amount of blurry
artefacts during playback with scenes where there is some motion in it
(as if the difference information from the last frame was corrupt). This
affects several codecs like mpeg4/XVID and h264.

Today I took pleasure into bisecting it down which was fun due to all the
recent sse2 instruction for sse CPUs bugs which first of all caused my builds
crashing mostly. Finally:

  face578d56c2d1375e40d5e2a28acc122132bc55 is the first bad commit
  commit face578d56c2d1375e40d5e2a28acc122132bc55
  Author: Ronald S. Bultje <rsbultje at gmail.com>
  Date:   Fri Sep 20 08:01:19 2013 -0400

      Rewrite emu_edge functions to have separate src/dst_stride arguments.

      This allows supporting files for which the image stride is smaller than
      the max. block size + number of subpel mc taps, e.g. a 64x64 VP9 file
      or a 16x16 VP8 file with -fflags +emu_edge.

  :040000 040000 887c5e644a8924a40c1e5e056ba20fa3495e5d18 e7d581f402be299bdf3fe53e878b5a1aaa8bd6ad M      libavcodec

Ingo