Without this exception files with ".gif" extension by default
recognized as input suitable for image2 demuxer rather than gif.
In order to pass image through gif demuxer it was necessary
to use -f gif option.
This change affected 'make fate' test results because previously
image2 demuxer and gif decoder took only first frame of multiframe
test data, which is no longer true with gif demuxer.
Signed-off-by: Vitaliy E Sugrobov <vsugrob@hotmail.com>
Gif demuxer is capable of extracting multiple frames from gif file.
In conjunction with gif decoder it implements support for reading
animated gifs.
Demuxer has two options available to user: default_delay and min_delay.
These options are for protection from too rapid gif animations. In practice
it is standard approach to slow down rendering of this kind of gifs. If you try to
play gif with delay between frames of one hundredth of second (100fps) using
one of major web browsers, you get significantly slower playback,
around 10 fps. This is because browser detects that delay value is less than some
threshold (usually 2 hundredths of second) and reset it to default value (usually 10
hundredths of second, which corresponds to 10fps). Manipulating these options user
can achieve the same effect during conversion to some video format. Otherwise user
can set them to not protect from rapid animations at all.
The other case when these options necessary is for gif images encoded according to
gif87a standard since prior to gif89a there was no delay information included in file.
Bump lavf minor version.
Signed-off-by: Vitaliy E Sugrobov <vsugrob@hotmail.com>
Prepare gif decoder for use in conjunction with gif demuxer.
Add capability of reading multiple frames instead of only first.
Implement support for different gif frame 'disposal methods'.
Add option that allows to change background color resulting from
conversion of gif with transparency to any other format which
not support it.
Also bump lavc minor version.
Signed-off-by: Vitaliy E Sugrobov <vsugrob@hotmail.com>
Replace literals with named constants in several pieces of code
like 'return -1' and 'case 0xab'.
Change the way decoder handles absence of image data in a file:
notify gif_decode_frame() caller with got_picture set to zero
instead of returning -1.
Signed-off-by: Vitaliy E Sugrobov <vsugrob@hotmail.com>
* commit '9d46eaec7a90bd8f5cd9e45398c6d17804182320':
build: The FLAC encoder also depends on the flacdsp code
img2: K&R formatting cosmetics
h264: check context state before decoding slice data partitions
flashsv: make sure data for zlib priming is available
Stefano Sabatini [Sun, 25 Nov 2012 14:45:58 +0000 (15:45 +0100)]
lavu/opt: change the way default pixel and sample format value is set
Use the i64 field rather than the string value. Using a string to set a
default sample/pixel format is weird, also the new interface is more
consistent with the rest of the API.
This is technically an API break, but hopefully there are no applications
using this feature outside of FFmpeg. In order to save backward
compatibility with mixed libraries in case libavutil is updated but not
the other libraries, some ifdeffery hacks are added.
Note that the version check is only performed when class->version != 0,
since if it is not defined then we assume that no version was defined and
the class is not affected by the change.
We will luckily get rid of the hack at the next major bump.
Martin Storsjö [Thu, 29 Nov 2012 15:02:42 +0000 (17:02 +0200)]
avutil: Include io.h with a separate condition from MapViewOfFile
The existence of MapViewOfFile isn't linked to the existence of
io.h.
Not all versions of windows have MapViewOfFile (in particular,
Windows Phone 8 and the "metro" windows 8 API subset don't),
while they still have io.h (and need it for open/read/close).
Martin Storsjö [Thu, 29 Nov 2012 15:02:24 +0000 (17:02 +0200)]
cmdutils: Use a configure check for enabling CommandLineToArgvW
This simplifies the condition to avoid hardcoding the systems
where the function exists. This also simplifies support for
newer Windows API subsets where this function doesn't exist,
such as Windows Phone 8 and the "metro" API subset of Windows 8.
* commit 'e4d349b4014ee2a03f521027e0bd1ace4a9e60bd':
fate: h264: Add dependencies
fate: ea: Add dependencies
fate: Do not unconditionally run libavutil tests
rtpenc_chain: Remove unused variable
nuv: check for malloc failure when allocating extradata
nuv: use the stream indices generated by avformat_new_stream()
* commit '5c7bf2dddee5bdfa247ff0d57cb8a37d19077f66':
lavf: move nuv fourcc audio tags from riff to nuv
lavf: add a common function for selecting a pcm codec from parameters
* commit 'bfe5454cd238b16e7977085f880205229103eccb':
lavf: move ff_codec_get_tag() and ff_codec_get_id() definitions to internal.h
lavf: move "MP3 " fourcc from riff to nut
fate: vpx: Add dependencies
fate: Fix wavpack-matroskamode test dependencies
x86: dsputilenc: port to cpuflags
Stefano Sabatini [Wed, 28 Nov 2012 23:27:25 +0000 (00:27 +0100)]
lsws: define version in SWScaler class
The version number is useful to check the libavutil version against which
the library was compiled at run-time, which in turn may be useful to deal
with binary compatibility issues.
* cus/stable:
ffplay: increase maximum frame duration to 1 hour for streams without TS discontinuity
ffplay: fix updating external clock after seeking
ffplay: disallow seeking before the start of the file
The commit has already been split and commited, this merge is just for metadata.
What has not been merged is the removial of some start/end_frame / draw_slice
related functions that are still in use. They can be removed once they are
unused.
Marton Balint [Thu, 22 Nov 2012 23:22:35 +0000 (00:22 +0100)]
ffplay: disallow seeking before the start of the file
In timestamp based seeking we update the external clock to the seek target,
therefore we should use sane timestamps even if libavformat could handle
seeking before the start of the file.
Anton Khirnov [Wed, 28 Nov 2012 20:02:09 +0000 (21:02 +0100)]
vf_select: switch to filter_frame
The new code reads the input frame when its ready, the previous
code did read the input frame during start_frame at which point it
may not yet be available.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
projects / ffmpeg / log