The sample aspect ratio is a per-frame property, so it makes sense to
define it in AVFrame rather than in the codec/stream context.
Simplify application-level sample aspect ratio information extraction,
and allow further simplifications.

This is similar to what was done with pkt_pts. This simplifies the
operation of extracting the pos information from the AVPacket, and
allows further simplifications.

flac.o implies vorbis_data.o because of flac channel layout.

This possibly fixes issue2679
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

One of the causes of this bug is that the h264 parser defaults low_delay
to 1, but the h264 codec defaults low_delay to 0. Really Ugly.

After many hours of looking at this, I'm still not sure how has_b_frames
is *intended* to behave, but to me the implementation appears way more
complicated than it ought to be.

My patch relies on the encoder to set an optional field in the SPS. This
works for libx264 streams, but I'm not sure that all h264 encoders will
set it.

This is more consistent with all the other codec names.

Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>

I still don't fully understand the cause but the difference between
the samples that trigger the bug and the samples that don't is
that the former uses delay frames and the later uses drop frames
as placeholders for the packed frame. So, if we see the one type
of frame, we can assume the bug will or won't be present.

Right now, I'm detecting the frame types by size, which may not be
safe in general, but given the specific codec and file type, I
expect any scenario where we encounter these frames where they
aren't being used for b-frame packing won't care one way or
another whether the work around is in effect or not.

Signed-off-by: Philip Langdale <philipl@overt.org>

Fix warning:
libavcodec/utils.c: At top level:
libavcodec/utils.c:714:5: warning: "FF_API_VIDEO_OLD" is not defined

Also fix trac issue #139.

This breaks API and ABI.

This works around a possibly exploitable crash.
Appearently, vlc can be exploited with a malicous file. This should get
reverted as soon as a proper fix is found.

Reported-at: Thu, 21 Apr 2011 14:38:25 +0000
Reported-by: Dominic Chell <Dominic.Chell@ngssecure.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 89f903b3d5)
(cherry picked from commit 9b919571e5)

int/unsigned is the natural memory access type for CPUs, using sized types
for temporary variables, counters and similar just increases code size and
can possibly cause a slowdown.

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

This is not documented (and possibly not originally intended),
but it's what the current reference decoder does.

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

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

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

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

This hack is no longer needed.

This reverts commit 191e08d113.

The lowres support doesn't work correctly (crops the video), so let's remove it.

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

lowres higher than 3 crashes ffmpeg/ffplay here

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

The lowres support doesn't work correctly (crops the video), so let's remove it.

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

The lowres support doesn't work correctly (crops the video), so let's remove it.

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

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

This reverts commit f4e043ff63.

Make av_get_profile_name() return NULL if no profile is detected.

Fix trac issue #130, fix crash reading file tek3.m2v.
(cherry picked from commit e5d80c7b2d)

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Make av_get_profile_name() return NULL if no profile is detected.

Fix trac issue #130, fix crash reading file tek3.m2v.

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

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

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

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

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