Fixes ticket 365.

It allows to check if a given codec can be written into a container.

Signed-off-by: Zohar Kelrich <lumimies@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

A loop control variable was shadowed inside the loop and never updated.

"SAR" (Sample Aspect Ratio) is globally preferred over "PAR" (Pixel
Aspect Ratio), although the two terms share the same semantics.

For example the corresponding AVStream field is called
sample_aspect_ratio, and libavfilter has a filter named setsar.

Therefore prefer the term "SAR" over "PAR" in the
libavformat/utils.c:dump_stream_format() and avcodec_string() output
for avoiding confusion.

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

Rename it to "avctx", the old name was confusing as the function is
used also with decoder contexts.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavformat/utils.c:599: warning: missing braces around initializer
libavformat/utils.c:599: warning: (near initialization for ‘ap.time_base’)

ic is NULL in case of error.

This fixes AAC playback in ffplay.

It's an XSI extension, not available on some supported systems.

Resetting it on codec init would incorrectly clear the values
if av_find_stream_info was already run before, in particular
breaking ffplay.

This fixes trac tickets #213 and #262.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Deprecate avcodec_alloc_context/2.

It supports passing options to codecs.

Code would allocate a new context but forget to assign it
to the pointer actually passed to avformat_open_input,
potentially causing a crash.
Even if it was initialized it would cause a memleak.
This caused crashes with e.g. mpd, see also
http://bugs.gentoo.org/show_bug.cgi?id=373423

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Signed-off-by: Mans Rullgard <mans@mansr.com>

av_open_input_stream used to allow this, even though it makes no sense.
Make it just print a warning instead of failing, thus restoring
compatibility.

Note that avformat_open_input() will still reject this combination.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

When providing a custom AVIOContex for a AVFMT_NOFILE format
only print a warning instead of erroring out.
This allows the code to work with older MPlayer versions that
just always set pb out of laziness.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

Fixed ticket245

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

Needed for proper behaviour in our old API compatibility code.

It supports more convenient setting of AVOptions.

Deprecate the last remaining member of AVFormatParameters.

Add support for demuxer private options.

Fixes issue2437.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This might happen if there was an error before priv_data was allocated
and result in segfault.

It's simpler and less error-prone.

Fixes some memleaks along the way.

Most of these variables are only used in av_dlog statements, some
are required but not used by other macros.

Signed-off-by: Mans Rullgard <mans@mansr.com>

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

Parenthesis are misplaced in calculation of max_time.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

More consistent/readable.

The new function accepts a slightly more intuitive order of paramters,
and returns an error code, thus allowing applications to report a
meaningful error message.