For some obscure reasons avcodec_set_dimensions() resets the width/height
so that the resulting value set in the stream is equal to the
corresponding coded_width/height, which is not the same as the correct
width/height in case of the H.264 and VP6F codecs.

This adds a codec-specific hack for VP6F which disables the call to
avcodec_set_dimensions() in avcodec_open2(), like it is done with H264. A
proper fix needs to be found yet.

Fix trac ticket #1386.

Based on a patch by Michael Niedermayer.

Trolled-By: Daemon404

See thread:
Subject: [FFmpeg-devel] [PATCH] ffprobe: Stash and use width and height before opening the codec
Date: Fri,  1 Mar 2013 10:41:34 -0500

It is supposed to be used with mencoder only and does
nothing when used with ffmpeg.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Avoid access to uninitialized values, which may result in a crash.

This happens for example in case of option parsing failure, since in that
case the internal AVBprint buffers are not initialized.

Also extends documentation for timestamp related ffmpeg options, in order
to make more apparent the fact that muxer processing may change the
timestamps values.

Hopefully increase readability.

List of clobbered registers fixed and added where it is lacking.
Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID732224
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID991837
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID991840
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID991852
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

May silence CID991853
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID991856
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID991857
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixed CID991859
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: Paul B Mahol <onemda@gmail.com>

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

This restores the performance of simple frame-threaded codecs back to
their pre-merge levels.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes compilation for --disable-everything --enable-parser=dvd_nav

Related to Ticket2375
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket2230
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Problem found using ASAN.
In some case, the ff_mov_get_channel_layout_tag function will not find 0
as termination for lookup in the array mov_ch_layouts_wav.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Also try to document the rational behind it.

This might fix Ticket2376
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

This was somehow missed when relicensing the decoder to LGPL
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This race will always happen sooner or later in a multi-threaded
environment and it will over time lead to OOM.
This fix works by spinning, there are other ways by which this
can be fixed, like simply detecting the issue after it happened
and freeing the over-allocated memory or simply using a mutex.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

our variant works fine and should be better
also remove related unused variable
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>