Note: a lot of muxers already do the flushing explicitly.

Remove the temporary hack for amerge and replace it with a
generic solution.

Also downgrade the error to a warning.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Change:
"source and destination color space are identical"

which is a true fact, but doesn't tell nothing about what's wrong, to:
"Source and destination color space must not be identical"

which tells more explicitly what the problem is.

* qatar/master:
  x86: Change a missed occurrance of int to ptrdiff_t for strides
  x86: Remove win64 xmm clobbering wrappers for the now removed avcodec_encode_video function
  bktr: Add missing includes for av_gettime()
  fate: use little endian yuv444p10 in h264-reinit tests

Nothing changes through this merge as the 3 bugfixes already exist
in ffmpeg and the clobbering wraper is still in use as we did not
yet remove avcodec_encode_video
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

* cus/stable:
  ffplay: avoid frame data leak on early frame drop
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes fate-lavf-flm under valgrind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: ubitux
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The partial frames leak a few uninitialized pixels through
due to incomplete interlaced error concealment support.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes memleak
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

This is necessary after the old av_gettime in libavformat was
dropped.
Signed-off-by: Martin Storsjö <martin@martin.st>