lavf/concatdec: add timestamp log

Help debugging timestamp conversion issues.
ffmpeg: fix printed timestamp for droped frames

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/truemotion2: Use av_freep() to avoid leaving stale pointers in memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/tta: Use av_freep() to avoid leaving stale pointers in memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/twinvq: Use av_freep() to avoid leaving stale pointers in memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: Use input packet duration in vfr/cfr code if available and valid

Fixes Ticket3052
ffmpeg: Check duration for overlap and clip in fps cfr/vfr code

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
doc/writing_filters: use ffmpeg.org instead of wikimedia.org for lena image

Less likely to change, and under our control.

Thanks-to: Michael Niedermayer
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