avformat/mpegts: Warn if ffio_ensure_seekback() failed

Should silence CID1257005

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avutil/buffer: add #if USE_ATOMICS around atomics specific functions to ensure sync types arent mixed by mistake

Fixes CID1257011

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mpeg: do not count PES packets inside PES packets during probing

Fixes: misdetection of test2.mp3

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mpeg: add commented out av_log() to probe

This is commonly needed for debugging mis-detections

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/utils: check AVframe.format being set in avcodec_encode_video2()

We dont fail hard if its not set as the old API allowed this and our examples
did in the distant past not set it, these examples still work with the
current code and some encoders.

Based on suggestion by: funman
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avutil/opt: Check av_parse_color() return value

Fixes: CID1257007

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Support raw dvdsub palette as stored on normal dvd's

This is how the palette is stored on dvd's. Currently
only xbmc passes the palette information to libavcodec
this way.
Check return value of avio_seek and avoid modifying state if it fails

The code still modifies state if the timestamp is not found. Not
sure exactly how to avoid that.
asf hacks
if av_read_packet returns AVERROR_IO, we are done. ffmpeg's codecs might or might not handle returning any completed demuxed packets correctly
added: Ticket #7187, TV Teletext support for DVB EBU Teletext streams
Don't accept mpegts PMT that isn't current
Don't reparse PMT unless it's version has changed
Read PID timestamps as well as PCR timestamps to find location in mpegts stream
Get stream durations using read_timestamp
changed: allow 4 second skew between streams in mov before attempting to seek
fixed: memleak in mpegts demuxer on some malformed (??) mpegts files with too large pes packets

at-visions sample file brokenStream.mpg
Speed up mpegts av_find_stream_info
dxva-h264 Fix dxva playback of streams that don't start with an I-Frame.
add public version of ff_read_frame_flush

We need this since we sometimes seek on the
input stream behind ffmpeg's back. After this
all data need to be flushed completely.