lavf/avformat.h: fix a few typos in AVFormatContext:avoid_negative_ts doxy
doc/ffmpeg-formats: reword and extend documentation for avoid_negative_ts option

Hopefully increase readability.
doc/ffmpeg,ffmpeg-formats: avoid to mention ffmpeg options from formats.texi

Also extends documentation for timestamp related ffmpeg options, in order
to make more apparent the fact that muxer processing may change the
timestamps values.
fate: add missing filter dep in metadata tests.
doc/developer: fix typo in regression tests ref.
ffprobe: set writer context to 0 after allocation

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.
changelog: 10% faster aac encoding on x86 and MIPS
lavfi: remove harddup libmpcodecs wrapper

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>
lavd/dshow: fix style and typo recently introduced.
lavc/utils: add VP6F hack for setting correct video size in stream

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
fate: make metadata fate tests only output ts and metadata.

The other information are just cluttering the output. The command line
is also simplified in the process.
er: set error_occured on missing slices

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