Fixes invalid memcpy and out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

It should be easy to add support but without a sample we would
not know if they work.

Fixes out of array reads

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized variables and possible out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Create dedicated subsection and itemize. Not done for every filters, but
a large part is done.

Partially rework the iteration logic, in order to limit iteration only
for the clipped overlay region.

The filter has been natively integrated into libavfilter.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

Do not re-call avcodec_get_context_defaults3(), it is already
called by avformat_new_stream() and it leaks the codec
priv_data that was already allocated.

Use avformat_free_context() instead of freeing (not)
everything manually.

Fix trac ticket #2322.

Address trac ticket #2311.

This reverts commit 6cc12353.

Conflicts:
	libavformat/version.h

Allowing to automatically select the concat demuxer raises
security concerns, as it allows a possibly hostile file to
access any file on the system. Guessing the format based on
the file name extension does not allow to enable the safe
mode designed to avoid it.

Let av_opt_set_defaults() set the value, which is simpler and more
idiomatic.

Also rename overlay test to overlay_yuv420 accordingly.

When parsing the Xing/Info tag, don't set the bit rate if it's an Info tag.

When parsing the stream, don't override the bit rate if it's already set,
otherwise calculate the mean bit rate from parsed frames. This way, the bit
rate will be set correctly both for CBR and VBR streams.
Signed-off-by: Alexander Kojevnikov <alexander@kojevnikov.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

* qatar/master:
  configure: Use check_builtin() where appropriate

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9c7d85b3':
  configure: Add check_builtin convenience function
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'f868b24d':
  configure: Add sanitize_var_name convenience function
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '813b82b9':
  configure: Fix silly typo in logging command of check_struct()
  fate: remove last incomplete frame from mpeg2-field-enc test

Conflicts:
	tests/fate/video.mak
	tests/ref/fate/mpeg2-field-enc
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

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

This is useful in all the places where special characters in
variable names are manually translated to underscores.

* cehoyos/master:
  Add h264chroma dependency for mpegvideo / lowres to configure.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fix building for some unusual configurations.

Fixes numerical overflow
Fixes Ticket2089
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket2022
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Ignore durations which differ significantly from the previous
Fixes Ticket2018
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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