Also don't write empty tags.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Regression introduced by 799f57acSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

Muxer code rebased/split out by: Jeff Blackburne <jblackburne@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

first_pic_header_flag needs to be set to allow the parsing code to change
some stream parameters, and not error out.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

The drawbox video filter is drawing lines one pixel thinner than
requested. The default thickness is 4 pixel but in fact the lines
drawn by default are only 3 pixel wide.

Change the comparisons in the code to fix this off-by-one bug. Also
change the default thickness from 4 to 3 to minimize the unexpected
changes from the user's perspective.

As I was already touching these lines, I also removed the "maximum" in
the thickness parameter description, as I don't think it was adding
any value and I even found it confusing.
Reviewed-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
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>

The filter was ported to a native libavfilter filter.

Fixes out of array accesses

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

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

Fixes out of array writes with multiple threads

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

This may fix an error with C++
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  4xm: check bitstream_size boundary before using it

Conflicts:
	libavcodec/4xm.c

See: 9c661e95Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'fbd0dacc':
  4xm: refactor decode_p_block

Conflicts:
	libavcodec/4xm.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '94aefb19':
  4xm: do not overread the source buffer in decode_p_block

Conflicts:
	libavcodec/4xm.c

The checks are replaced by av_assert0() as the conditions should
be impossible. If these asserts fail, there is a bug elsewhere
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'be373cb5':
  4xm: do not overread the prestream buffer

Conflicts:
	libavcodec/4xm.c

See: 9c661e95Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'de2e5777':
  4xm: validate the buffer size before parsing it

Conflicts:
	libavcodec/4xm.c

See: 9c661e95Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '145023f5':
  4xm: reject frames not compatible with the declared version

See: c4338237Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '1f0c6075':
  4xm: drop pointless assert

Conflicts:
	libavcodec/4xm.c

The added condition is impossible to occur and thus is added to the assert.
The assert is not removed from the default case, as the default case cannot
occur. Thus either it should stay as is or the case as a whole be removed.
For extra safety, to ensure this doesnt change the assert is changed to
av_assert0()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b8b80990':
  4xm: forward errors from decode_p_block

Conflicts:
	libavcodec/4xm.c

Impossible to be false check has been replaced by av_assert0()
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '50ec1db6':
  4xm: fold last_picture lazy allocation in decode_p_frame

Conflicts:
	libavcodec/4xm.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '42d73f7f':
  4xm: do not overread while parsing header

Conflicts:
	libavformat/4xm.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e7a44f87':
  4xm: refactor fourxm_read_header

Conflicts:
	libavformat/4xm.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e6496ea7':
  4xm: K&R formatting cosmetics

Conflicts:
	libavformat/4xm.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '08859d19':
  4xm: use the correct logging context
  g2meet: Fix a typo in the height comparison
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket2580
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

frei0r license is GPL.

Based on a patch by Timothy Gu <timothygu99@gmail.com>.

See thread:
Subject: [FFmpeg-devel] [PATCH 1/2] LICENSE: Complete GPL'd external libraries list
Date: Thu,  6 Jun 2013 18:55:30 -0700

Based on the libavfilter SOC filter by Vitor Sessak, with the following additions:
* integer arithmetic
* bilinear interpolation
* RGB path
* configurable parametric angle, output width and height

Address trac issue #1500.

See thread:
Subject: [FFmpeg-devel] [WIP] rotate filter(s)
Date: 2010-10-03 17:35:49 GMT

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

Possibly fixes Ticket2497
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Prevent buffer overread.

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

Directly return from code 1, 2 and 6 codepaths and simplify the
remaining one to have a single overflow check and a single call to
mcdc.

Check for out of picture macroblocks before calling mcdc.

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

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

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

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