Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 878e5bd6

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

If the motion vector is at a subpixel position, we need 3 pixels below
the motion vector's wholepel position available, not 2, since the MC
filter is a sixtap filter for the hpel position, and then a bilin filter
for the qpel position.

This patch fixes highly irreproducible (0.1%) fate failures in frame 2
and 4 of h264-conformance-cama2_vtc_b (e.g. first P-frame, first field,
last line of MB x=40,y=2 and second field and last lines of MBs x=39-40,
y=3). These used pre-loopfilter instead of post-loopfilter data because
the await_progress() waited for one line too little in that field, and
the motion vector of these particular MBs happened to align exactly to a
position where that demonstrates the bug.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2c85d7c0

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

Clobbering these tables will temporarily clobber the template used
as a basis for other threads to start decoding from. If the other
decoding thread updates from the template right at that moment,
subsequent threads will get invalid (or, usually, none at all) mmco
tables. This leads to invalid reference lists and subsequent decode
failures.

Therefore, instead, decode the mmco tables only for the first slice in
a field or frame. For other slices, decode the bits and ensure they
are identical to the mmco tables in the first slice, but don't ever
clobber the context state. This prevents other threads from using a
clobbered/invalid template as starting point for decoding, and thus
fixes decoding in these cases.

This fixes occasional (~1%) failures of h264-conformance-mr1_bt_a with
frame-multithreading enabled.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit f6badba1

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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d676598f)

Fixes PCM audio in Kansas Pheasant Hunt 2000 mpg file.
Reported-by: Mashiat Sarker Shakkhar
(cherry picked from commit ad406f7e)

It was always detected successfully.
(cherry picked from commit c345100e)

Fixes Ticket1905, Ticket2114
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2713e43a)

Fix trac ticket #2083.
(cherry picked from commit 69a1667b)

Fixes Ticket913
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 4784a135)

Fixes Ticket2088
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 341e40f1)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3a6b6f42)

This is consistent with the other ff_ass_split_* functions.

It also fixes a crash when trying to split a dialog with text=NULL
(which seems to happen when the text of the dialog is empty); basically,
this commit fixes crashes when trying to encode an empty text subtitle
dialog (see subrip and mov_text encoders).

Fixes Ticket2048.
(cherry picked from commit c83002a4)

This was broken in 0d96ec19 under the
assumption that there is only one tref leaf atom.

Fixes Ticket #2081.
(cherry picked from commit 765158dd)

Fixes Ticket #2087.
(cherry picked from commit 7d66bc79)

Fixes Ticket1817
Based on patch by: Przemyslaw Wesolek <przemyslaw.wesolek@go.art.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit adbb75db)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a0167958)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 03df9720)

Conflicts:
	libavcodec/mpeg12enc.c

see trac 1345
https://ffmpeg.org/trac/ffmpeg/ticket/1345

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c73b1a1d)

0/0 fails to be parsed

Fixes Ticket1814
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a63d7213)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit b7280cff

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

This reverts 2de88776



Fixes Ticket 1883
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit e5927910

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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 343c73e2

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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 8c93269e)

Conflicts:

	libavformat/asfdec.c

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 2d8c76eb)

Conflicts:

	libavformat/asf.h

Fixes ticket #1942.
(cherry picked from commit dd6abc92)

Fixes ticket1804
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit be89693d)

Some files simply contain invalid info tags.
Fixes unrelated bug posted into Ticket1821
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 09456d0d)

Fixes Ticket1821
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d0c27e88)

Fix Ticket1986
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit cbe43e62)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3a45688a)

Fixes fate-h264-conformance-cvnlfi2_sony_h and smllwebdl.mkv from
https://github.com/OpenELEC/OpenELEC.tv/issues/1557 .
(cherry picked from commit 24c62ea7

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

The previous code computes the offset by reversing the growth
of the allocated buffer size: it is complex and did lead to
inconsistencies when the size limit is reached.

Fix trac ticket #1991.
(cherry picked from commit 03847eb8)

Conflicts:
	libavformat/utils.c

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

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a7ee6281)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 6abb9a90)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 3ae61045)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit d6c18488)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 63ac6486)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c0d68be5)

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit be818df5)