This fixes a integer overflow in fate
Reviewed-by: Clément Bœsch <ubitux@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Clément Bœsch <ubitux@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Also add example showing cat piping images to ffmpeg.
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

Also improve overall consistency.

Similarly to 03f5043f, we use the FTRAPV config setting.

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

The flags are necessary for the auto inserted scaler (because the
overlay filter needs an alpha channel for the overlay surface).

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

Illustrate the use of return values, av_err2str and
avcodec_get_name.

This flag is not necessary.

See 36e61e24.

Fixes Ticket646
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Comparing AVCodecContext.pix_fmt against the get_pixel_format() return
value has the side effect of calling the get_format() callback on each
slice. Users of the callback will probably handle hardware accelerator
initialization in the callback.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket2088
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

They were two very short files that cover ffmpeg-specific features.

Necessary after 04a530f7.

Consider the color space as an hypercone with apex alpha=0
and base alpha=1 instead of an hypercube.
Make the encoder consider very transparent colors more similar
even if the hue is very different.
This corresponds roughly to using the alpha as a weight for the
color difference.
Only 4 bits of alpha are used, because this is what dvdsub uses,
and it avoids overflows.

Fix trac ticket #2005.

Use the first 64 bits of the SHA1 of the content as file UID
instead of a random number if the bitexact flag is set.

Signed-off-by: rogerdpack <rogerpack2005@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes #1697.

Fixes Ticket #2087.

This reverts commit 580ee973.

There can be only one track reference. The multiple tref handling is
handled at a different level.

Fix trac ticket #2083.

Found-by: durandal_1707
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This was broken in 0d96ec19 under the
assumption that there is only one tref leaf atom.

Fixes Ticket #2081.