The new code is faster and reuses the previous state in case of
multiple calls. For testing the iterations are reduced and several
entropy sources are disabled.
Its based on SHA-1
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reported and tested by ami_stuff.

See ticket #1191.

Apple softwares seem not to add a tref for the timecode (the next commit
fixes this issue), but at least FFmpeg does.

This can be used to generate a sample that demonstrates the feature:

    ./ffmpeg -f lavfi -i testsrc    \
             -f lavfi -i mptestsrc  \
             -f lavfi -i rgbtestsrc \
             -map 0 -map 1 -map 2   \
             -metadata:s:0 timecode=00:00:00:12 \
             -metadata:s:2 timecode=01:02:12:20 \
             -t 10 -y out.mov
    ./ffprobe out.mov

The timecode metadata being transmitted to the video streams, it can be
kept while transmuxed/transcoded.

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: Michael Niedermayer <michaelni@gmx.at>

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

* qatar/master:
  libmp3lame: add missing layout terminator
  avconv: multithreaded demuxing.
  Bump lavu minor and add an APIChanges entry for audioconvert functions.
  audioconvert: add a function for extracting the channel with the given index
  audioconvert: add a function for getting the name of a single channel.
  audioconvert: add a function for getting channel's index in layout
  audioconvert: use av_popcount64 in av_get_channel_layout_nb_channels
  vf_libopencv: add missing headers.
  iac: add missing dependency

Conflicts:
	configure
	doc/APIchanges
	ffmpeg.c
	libavcodec/libmp3lame.c
	libavutil/avutil.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

lets hope this makes suncc happy finally ...
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Return a const char *, fix warnings:
libavfilter/avfilter.c: In function ‘default_filter_name’:
libavfilter/avfilter.c:414:5: warning: return discards ‘const’ qualifier from pointer target type [enabled by default]
libavfilter/avfilter.c: At top level:
libavfilter/avfilter.c:419:5: warning: initialization from incompatible pointer type [enabled by default]
libavfilter/avfilter.c:419:5: warning: (near initialization for ‘avfilter_class.item_name’) [enabled by default]

a period of 1 is the smallest that makes sense
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

The rounding was wrong due to incorrect ue of floats,
changed to rationals and av_rescale.

The results were not properly passed to SDL.

The size passed to SDL_CreateYUVOverlay is the size
of the video in pixels, it must not take the aspect ratio
into account.

It allows vsync to be automatically set to passthrough.

When there are multiple input files, run demuxing for each input file in
a separate thread, so reading packets does not block.

This is useful for achieving low latency when reading from multiple
(possibly slow) input streams.

Fix build after b74a1da4.

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: Michael Niedermayer <michaelni@gmx.at>

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

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

Its only used through the start_frame pointer and thus cannot be inlined easily.
It also appears to break compilation with some unidentified compiler on darwin.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>