decode_subframe_lpc().

just set data_size to zero.

fixes incorrect bitrate reporting and potential misreporting of the number of
channels.

Having it there forces decoding of a frame in order to get frame_size, but it
is not really needed for proper demuxing or decoding.

The first timestamp should be negative due to delay.
Also, do not set AVCodecContext.frame_size unnecessarily.

Using AVCodecContext.frame_size is not reliable.

This avoids some unused variable warnings with YASM disabled.

This is done conditional to the libavcodec version to avoid ABI breaks.

This fixes 'make checkheaders' on non-W32THREADS systems.

Deprecate avcodec_get_context_defaults/avcodec_get_context_defaults2

Manual replacements are done in this commit.

In many cases, the id is some constant made up number (e.g. 0 for video
and 1 for audio), which is then not used in the demuxer for anything.
Those ids are removed.

Trivial replacements with sed are done in this commit:
sed 's/av_new_stream(\([^)]*\), 0)/avformat_new_stream(\1, NULL)/'

It takes a codec parameter, thus enabling codec-specific defaults.

When scaling backward predicted MVs in second B-field, the scaling table is
opposite of that for P field pictures; i.e. first field P table will be used as
second field B table and second field P table will be used as first field B
table. This is not documented in the spec, but exists in the ref. decoder.

This fixes SA10139.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

Fixes make install.

The licence was changed from GPL to LGPL with explicit approval from
the original author.

See thread:
Subject: [FFmpeg-devel] [PATCH] lavfi: add rgbtestsrc source,
        ported from MPlayer libmpcodecs
Date: Mon, 11 Jul 2011 16:32:41 +0200
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

Use the native libx264 options and rename all the preset to use
the avpreset extension.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

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

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