Recent .srt files with CR only were found in the wild.

This fixes a bunch of possible overread in avformat with the idiom p +=
strcspn(p, "\n") + 1 (strcspn() can focus on the trailing '\0' if no
'\n' is found, so the +1 leads to an overread).

Note on lavf/matroskaenc: no extra subtitles.o Makefile dependency is
added because only the header is required for ff_subtitles_next_line().

Note on lavf/mpsubdec: code gets slightly complex to avoid an infinite
loop in the probing since there is no more forced increment.

I found a bunch of (recent) SRT files in the wild with 3 to 10 line
breaks at the beginning.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

Fixes: ffmpeg -i input -c:v prores output.mkv
Signed-off-by: Paul B Mahol <onemda@gmail.com>

In particular, print the standard supported by the selected input.
Additionally, use PRIx64 everywhere when printing standards.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

* qatar/master:
  lavf: fix the comparison in an overflow check

Conflicts:
	libavformat/utils.c

See: a5d67bc7Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7ee191ca':
  dv: Add a guard to not overread the ppcm array

See: 3669915eMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '85ac1258':
  nuv: check ff_rtjpeg_decode_frame_yuv420 return value

Conflicts:
	libavcodec/nuv.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Some fields of the frame are changed to reflect encoder decissions like
if its a keyframe. It thus cannot be constant.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

Unbreak xyz12 with vflip.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Put it inside its own ifdef conditional.
Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

CC: libav-stable@libav.org

if channels is 0 it actually would be uninitialized, thus an assert with comment is added
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

if channels is 0 it actually would be uninitialized, thus an assert with comment is added
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

bits_per_coded_sample should be set from demuxer and
not from decoder.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>