Currently, the API takes an external AVCodecContext, which is used only
for extradata and logging. This change will allow to it to work without
an AVCodecContext in the following commits.

It is never an error if this method failed. If rt->live was
explicitly set to 0 (known to be a recorded file), print it
as a warning, otherwise print it as a debug message.

Based on a patch by Michael Niedermayer.
Signed-off-by: Martin Storsjö <martin@martin.st>

The application will destroy the underlying hardware handles when
get_format() gets called again. Also this ensures the
deinitialization takes place if the get_format callback returns an
error.

Regression from 1c80c9d7.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Bug-Id: CID 732291

CC: libav-stable@libav.org
Bug-Id: CID 732250

CC: libav-stable@libav.org
Bug-Id: CID 1238802 / CID 1238793 / CID 1238785
        CID 1238808 / CID 1238809

CC: libav-stable@libav.org
Bug-Id: CID 717906 / CID 717907 / CID 717916 /
        CID 717917 / CID 717919 / CID 732259

CC: libav-stable@libav.org
Bug-Id: CID 732293 / CID 732294

mb_type is initialized to 0 and never updated before the check.

Bug-Id: CID 1238782

Bug-Id: CID 1238816

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

We deviate slightly from the iso specs for these files.
Signed-off-by: Martin Storsjö <martin@martin.st>

The tfdt atom shouldn't be needed in those cases, we already
write tfxd atoms for ismv anyway, which is roughly equivalent.

This avoids having to declare the iso6 brand for ismv files.
Signed-off-by: Martin Storsjö <martin@martin.st>

ISO/IEC 14496-12:2012/Cor 1:2013 is explicit about how this should be
handled. All zeros doesn't mean that the full file has got a zero
duration, only that the track samples described within the initial moov
have got zero duration. An all ones duration means an indeterminate
duration.

Keep writing a duration consisting of all ones for the ISM mode -
older windows media player versions won't play a file if this is
zero. (Newer windows media player versions play either version fine.)
Signed-off-by: Martin Storsjö <martin@martin.st>

Similarly to the omit_tfhd_offset flag added in e7bf085b, this
avoids writing absolute byte positions to the file, making them
more easily streamable.

This is a new feature from 14496-12:2012, so application support
isn't necessarily too widespread yet (support for it in libav was
added in 20f95f21 in July 2014).
Signed-off-by: Martin Storsjö <martin@martin.st>

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

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Martin Storsjö <martin@martin.st>

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

The custom IO flag actually never is set for muxers, only for
demuxers, so the check was pointless (unless a user intentionally
would set the flag to signal using custom IO).
Signed-off-by: Martin Storsjö <martin@martin.st>

If one track doesn't have any samples within a moof, no traf/trun
is written for it. When the omit_tfhd_offset flag is set, none
of the tfhd atoms have any base_data_offset set, and the implicit
offset (end of previous track fragment data, or start of the moof
for the first trun) is used.
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes a double free in case of av_packet_new_side_data() failure.

CC: libav-stable@libav.org
Bug-Id: CID 703626

CC: libav-stable@libav.org
Bug-Id: CID 732203 / CID 732204

The code would have segfaulted before if oggstream were NULL.

CC: libav-stable@libav.org
Bug-Id: CID 732218

xcb-utils are not needed anymore.

This is the same as the previous change, but for applications using the
old API (such as VLC 2.2).
Signed-off-by: Anton Khirnov <anton@khirnov.net>

The H.264 Constrained Baseline Profile (CBP) is a subset of both the
Main Profile and the Baseline Profile. In principles, a hardware
decoder that supports either of those can decode CBP content. As it
happens, Main is supported by all VDPAU drivers, and Baseline is not.

So favor map CBP to MP for now. Hopefully in the future libvdpau will
offer an explicit choice for CBP.

This fixes bug 757.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Makes coverity less confused and code more readable.

Bug-Id: CID 732262

CC: libav-stable@libav.org
Bug-Id: CID 733777

CC: libav-stable@libav.org
Bug-Id: CID 732246

should be the raw amount of pixels (for example 3840x1080 for full HD side by
side) and the DisplayWidth/Height in pixels should be the amount of pixels for
one plane (1920x1080 for that full HD stream)."

So, move the aspect ratio check in the mkv_write_stereo_mode() function
and always write the embl when stereo format and/or aspect ration is set.
Also add a few comments to that function.

CC: libav-stable@libav.org
Found-by: Asan Usipov <asan.usipov@gmail.com>

Matches the x11grab screen capture by features.

While a standalone implementation is nice, we already depend on
gmtime and gmtime_r in a number of places.
Signed-off-by: Martin Storsjö <martin@martin.st>

If it isn't available in the system, we've got a fallback to
the normal localtime function, so normal code can assume it is
available as long as time_internal.h is included.
Signed-off-by: Martin Storsjö <martin@martin.st>

gmtime isn't thread safe in general. In msvcrt (which lacks gmtime_r),
the buffer used by gmtime is thread specific though.

One call to localtime is left in avconv_opt.c, where thread safety
shouldn't matter (instead of making avconv depend on the libavutil
internal header).
Signed-off-by: Martin Storsjö <martin@martin.st>

This allows writing most code as if they always are is available.

These are ok to use from other libraries even though it's not a
public header, since they only provide an inline declaration, and
doesn't add an actual dependency on lavu internals. (This can be
considered more a build system compatibility fallback than a
libavutil feature.)
Signed-off-by: Martin Storsjö <martin@martin.st>

If the buffer provided to strftime is too small, the buffer contents
are indeterminate - it does not guarantee actually null terminating
the buffer.
Signed-off-by: Martin Storsjö <martin@martin.st>