Paul B Mahol [Mon, 28 Dec 2015 19:20:32 +0000 (20:20 +0100)]
avfilter/avf_showspectrum: make colors for log scale more user friendly
Previosly output was almost useless because background noise, due to
windowing function picked and which is not actually present in audio,
had too much brightness.
Now output of sine wave matches more with SoX.
Rodger Combs [Thu, 8 Oct 2015 02:32:14 +0000 (21:32 -0500)]
lavf: add automatic bitstream filtering; bump version
This solves the problem discussed in https://ffmpeg.org/pipermail/ffmpeg-devel/2015-September/179238.html
by allowing AVCodec::write_header to be delayed until after packets have been
run through required bitstream filters in order to generate global extradata.
It also provides a mechanism by which a muxer can add a bitstream filter to a
stream automatically, rather than prompting the user to do so.
Mats Peterson [Sun, 27 Dec 2015 20:28:09 +0000 (21:28 +0100)]
avformat/matroskadec: palettized QuickTime video in Matroska
Palettized QuickTime video in Matroska has hitherto not been recognized
whatsoever, and the "palette" used has been completely random.
The patch for matroskadec.c fixes this issue by adding a palette side
data packet in matroska_deliver_packet(), much in the same way as it's
done in mov.c.
Video samples for testing are available at
https://drive.google.com/open?id=0B3_pEBoLs0faWElmM2FnLTZYNlk.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Mats Peterson [Sun, 27 Dec 2015 20:28:09 +0000 (21:28 +0100)]
avformat: factor ff_get_qtpalette() out of mov.c
This consists mainly of moving the palette handling from
the mov_parse_stsd_video() function to a new ff_get_qtpalette() function
in the new file qtpalette.c, which will be shared by both matroskadec.c and
mov.c.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
avcodec/on2avc: fix regression on icc since 5495c7f
Should fix the regression, and also speeds up table generation.
Tables tested on GNU/Linux+clang: they are identical to the ones prior
to 5495c7f. ff_exp10 caused one slight change in one entry, 50000 became
50001 due to somewhat incorrect rounding.
Fast, reasonably accurate 10^x. Alternative of detection of libm exp10 at configure
time is not worth the trouble, since it is anyway not POSIX or ISO C,
and currently only the GNU libm has it. Furthermore, GNU libm's variant
is ~ 2x slower, and is ironically not correctly rounded (2 ulp off) to justify all
that slowdown.
Reviewed-by: James Almer <jamrial@gmail.com> Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Stefan Pöschel [Sun, 13 Dec 2015 10:54:32 +0000 (11:54 +0100)]
avformat/mpegtsenc: add flag to embed an AC-3/E-AC-3 ES the DVB way
So far an AC-3 elementary stream is refered to in the PMT according to
System A (ATSC). An E-AC-3 ES in contrast is embedded the System B (DVB) way.
To fix this inconsistency, this commit changes the default E-AC-3 behaviour to
use the ATSC way, too. Furthermore a new flag is added to optionally select the
DVB way (regarding both codecs and possible further differences in the future).
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
exp10 is a function available in GNU libm. Looks like no other common
libm has it. This adds support for it to FFmpeg.
There are essentially 2 ways of handling the fallback:
1. Using pow(10, x)
2. Using exp2(M_LOG2_10 * x).
First one represents a Pareto improvement, with no speed or accuracy
regression anywhere, but speed improvement limited to GNU libm.
Second one represents a slight accuracy loss (relative error ~ 1e-13)
for non GNU libm. Speedup of > 2x is obtained on non GNU libm platforms,
~30% on GNU libm. These are "average case numbers", another benefit is
the lack of triggering of the well-known terrible worst case paths
through pow.
Based on reviews, second one chosen. Comment added accordingly.
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
lavfi/af_aemphasis: remove unnecessary complex number usage
complex is not available on all platforms. Furthermore, it is trivial to
rewrite complex number expressions to real arithmetic, and in fact
sometimes advantageous for performance reasons: by wrapping as a complex,
one forces a particular Cartesian representation that is not necessarily optimal for the purpose.
Configure dependencies also removed, and aemphasis is now available across
all platforms.
Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
wm4 [Wed, 23 Dec 2015 14:08:58 +0000 (15:08 +0100)]
avformat/subtitles: treat negative duration like unknown duration
Fixes a specific srt sample, which has an event with negative duration.
libavcodec will convert an event with negative duration to an ASS event
which will be displayed forever, which is not wanted here.
Treat negative duration always as unknown duration instead, and show it
until the next subtitle event.
A negative bits_per_coded_sample doesn't make sense.
If it is too large, the size calculation for av_get_packet overflows,
resulting in allocation of a too small buffer.
Also make sure width and height are sane.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Nicolas George [Wed, 30 Sep 2015 14:11:57 +0000 (16:11 +0200)]
lavfi: make request_frame() non-recursive.
Instead of calling the input filter request_frame() method,
ff_request_frame() now marks the link and returns immediately.
buffersink is changed to activate the marked filters until
a frame is obtained.
Nicolas George [Thu, 24 Sep 2015 08:07:42 +0000 (10:07 +0200)]
lavfi: replace link.closed by link.status.
The status field can carry any error code instead of just EOF.
Also only update it through a wrapper function and provide a timestamp.
Update the few filters that used it directly.
Nicolas George [Thu, 24 Sep 2015 08:06:26 +0000 (10:06 +0200)]
lavfi: deprecate avfilter_link_set_closed().
Applications are not supposed to mess with links,
they should close the sinks.
Furthermore, this function does not distinguish what end
of the link caused the close and does not have a timestamp.
Nicolas George [Thu, 24 Sep 2015 07:30:05 +0000 (09:30 +0200)]
lavfi: rename link.current_pts to current_pts_us.
This field is used for fast comparison between link ages,
it is in AV_TIME_BASE units, in other words microseconds,
µs =~ us.
Renaming it allows a second field in link time base units.
Claudio Freire [Tue, 22 Dec 2015 08:26:12 +0000 (05:26 -0300)]
AAC encoder: fix possible assertion failure in PNS
Fix possible SF delta violation that would cause an
eventual assertion failure in some corner cases (esp
on very low bitrates) when marking bands for PNS due
to misuse of the sf_delta utilities
'erf' is far from the best name for a variable and is not very
descriptive since the actual variable points to the comparitively best
IS phase. Therefore rename it to 'best'.
projects / ffmpeg / log