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: NVitaliy E Sugrobov <vsugrob@hotmail.com>

Also introduce local img_ namespace to simplify debugging.

This allows decoding of concatenated frames encoded in
uncompressed formats like v210.
The frame size cannot be generally calculated, FFmpeg
also supports broken encoders.

Fixes ticket #1869.

Fixes CID703626.
Signed-off-by: NPaul B Mahol <onemda@gmail.com>

They can be many other things and this otherwise breaks probing of some .raw files.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Zero sized files would cause the contexts to leak away.
Signed-off-by: NLuca Barbato <lu_zero@gentoo.org>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMartin Storsjö <martin@martin.st>

Allow to override the default 'glob_sequence' value, which is deprecated
in favor of the new 'glob' and 'sequence' options.

The new pattern types should be easier on the user since they are more
predictable than 'glob_sequence', and do not require awkward escaping.

Take the new parameter start_index into account.

The new name seems more consistent with the assumed logic.

"start_index" represents the minimum accepted value as first index, and
not the maximum value as implicitely assumed by the previous name.

This seems consistent with the assumed meaning of the option.

Currently if a pattern is given we search for up to the fifth file name in
that sequence. This option sets that limit to an arbitrary number.
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Currently if a pattern is given we look for up to the fifth file name in
the sequence. This option sets that limit to an arbitrary number.
Signed-off-by: NAnton Khirnov <anton@khirnov.net>

tilde expansion should/can be done by the shell
Reviewed-by: NAlexander Strasser <eclipse7@gmx.net>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

  This changes globbing support to only be used if the character
contains at least one glob meta character that is preceded by
an unescaped %. To escape a literal % one would use %% which is
identical to the way to match a % with image2 sequence generation
feature.

* Makes it possible to have patterns like %04d-[720p].jpg work
  again with sequence number generation. Previously this would
  always be detected as a glob pattern and was interpreted by
  the image2 glob code instead.

* Makes it possible to use %*-[720p].jpg to match above pattern
  without having to double escape it to be not interpreted by most
  shells and not by the image2 glob code (previously one would
  need to use \*-\\\[720p\\\].jpg to achieve the same)
Signed-off-by: NAlexander Strasser <eclipse7@gmx.net>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>
Signed-off-by: NDiego Biurrun <diego@biurrun.de>

Signed-off-by: NPaul B Mahol <onemda@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NJustin Ruggles <justin.ruggles@gmail.com>

Signed-off-by: NKostya Shishkov <kostya.shishkov@gmail.com>

Some applications use the j2c extension for jpeg2000 codestream files.
Signed-off-by: NJean First <jeanfirst@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

It's supposed to be called only from (de)muxers.

Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>