Since 33d18982fa (the commit that
introduced the new bsf API) allocating an enlarged buffer in case
extradata needs to be added to a packet is done via av_new_packet(),
so that libavutil/mem.h is no longer needed.
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
3469cfab added a check for whether the extradata coincided with the
beginning of the packet's data in order not to add extradata to packets
that already have it. But the check used was buggy for packets whose
size is smaller than the extradata's size. This commit fixes this.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The dump_extra bitstream filter currently simply adds the extradata to
the packets indicated by the user without checking whether said
extradata already exists in the packets. Besides wasting space
duplicated extradata in the same packet/access unit is also forbidden
for some codecs, e.g. MPEG-2.
This check has been added to be able to use the mpeg2_qsv encoder (which
only adds the sequence headers to the first packet) in broadcast
scenarios where repeating sequence headers are required.
The check used here is not perfect: E.g. dump_extra would add the
extradata to a H.264 access unit consisting of an access unit delimiter,
SPS, PPS and slices.
Fixes#8007.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The default is to dump extradata to keyframes, not all frames.
Also improve the description of the relevant AVOption.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
None of these symbols should be accessed directly, so declare them as
hidden.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit d36beb3f69)
Original patch by Jason Millard jsm174 _at_ gmail
Date: On Fri, 11 May 2007 11:14:01 -0400
Subject: [FFmpeg-devel] enable/disable bitstream filters?
Originally committed as revision 9010 to svn://svn.ffmpeg.org/ffmpeg/trunk
with this mp3 should be binary identical to what you had before header compression
support mp3 with crc (by droping the crc and putting it back during header decompress, currently its just random tough, does any deocoder even check it?)
Originally committed as revision 6960 to svn://svn.ffmpeg.org/ffmpeg/trunk
this will make mp3 frames 4 bytes smaller, it will not give you binary identical mp3 files, but it will give you mp3 files which decode to binary identical output
this will only work in containers providing at least packet size, sample_rate and number of channels
bugreports about mp3 files for which this fails are welcome
and this is experimental (dont expect compatibility and dont even expect to be able to decompress what you compressed, hell dont even expect this to work without editing the source a little)
Originally committed as revision 6958 to svn://svn.ffmpeg.org/ffmpeg/trunk
Anton Khirnov
Andreas Rheinhardt
James Almer
Michael Niedermayer
Jun Zhao
Vittorio Giovara
Paul B Mahol
Martin Storsjö
Mans Rullgard
Diego Elio Pettenò
Aurelien Jacobs
Jason Millard
Alex Beregszaszi
Michael Niedermayer
Diego Biurrun