Some software does not support edit lists at all, the adobe flash
player seems to be one of these. Which results in AV sync errors when
edit lists are used to adjust AV sync.
2nd try on implementing this, the first try had various issues
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
The timebases before where only guranteed to be 1/fps precisse
and could cause AV sync errors on low fps
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
At the moment, the moov header is written at the end of the file, so we
can use the current offset (which focus on the end of the mdat already
written) to guess if 64-bits offset will be required or not.
Though, the next commits will make possible the writing of this table at
the beginning, so this heuristic can't work. As a consequence, we check
all the values within the potential offset table for any value >
32-bits.
This is consistent with stdio and is what we want to do in all cases.
Fixes a bug in the voc muxer which didn't flush in write_trailer()
previously. This is the cause of the change in the test results.
Implements support for tmpo atom for mp4 files, typically used to store BPM. -metadata "tmpo=127" as a command line option will record 127 as the BPM in the meta data.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
As packet duration is not stored inherently in MPEG4 containers,
subtitles have their duration expressed by storing an additional
empty packet with a pts matching the desired end time of the real
subtitle. Additionally, it is generally expected that all streams
start at time = 0, so an empty packet needs to be inserted at the
beginning of the stream, before the first real subtitle.
Unfortunately, ffmpeg lacks a proper way to express that a subtitle
might map to multiple packets, so the muxer is the only place we
can handle this.
Signed-off-by: Philip Langdale <philipl@overt.org>
The native decoder and MPlayer's binary decoder only need the
APRG atom, QuickTime at least requires also the ARES atom and
four additional 0 bytes padding at the end of stsd.
There is basic support for muxing chapter information into the
Apple Quicktime format already, but there are two errors which
prevent correct detection on the player side.
1) A special apple 'text' atom needs to be included inside the
gmhd atom.
2) The *different* 'text' atom inside the 'stsd' atom needs a
proper header.
With these changes, the chapters are now picked up by Apple
players and reported correctly by tools like mediainfo and mp4chaps.
v3 Update: The stub TextSampleEntry creation is moved to where the
chapter track is created so it's now specific to this track.
Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Michael Niedermayer
Luca Barbato
Jason
Tim Nicholson
bbraun
Anton Khirnov
Diego Biurrun
Clément Bœsch
Martin Storsjö
Kari Lentz
Clément Bœsch
Piotr Bandurski
Philip Langdale
Carl Eugen Hoyos
Ronald S. Bultje
Stefan Gehrer
Al@dneg.com
Alex Converse