The frame is not used after being added to the filter
graph, there is no need to keep the reference.

AVABufferSinkParams are ignored by avfilter_graph_create_filter,
therefore the example is misleading.  Use av_opt_set_int_list to
configure abuffersink directly.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes accessing freed memory
Signe-off-by: Michael Niedermayer <michaelni@gmx.at>

This filter is not required anymore with aformat. Drop it at next bump.

Simplify.

In particular, fix crash.

In particular, fix crash.

Do not re-call avcodec_get_context_defaults3(), it is already
called by avformat_new_stream() and it leaks the codec
priv_data that was already allocated.

Use avformat_free_context() instead of freeing (not)
everything manually.

Fix trac ticket #2322.

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

The size of the AVFrame structure is not part of the ABI;
it can grow with later versions. Therefore, applications
are not supposed to allocate AVFrame directly, they are
supposed to use avcodec_alloc_frame() instead.

Fix leak.

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

Illustrate the use of return values, av_err2str and
avcodec_get_name.

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

s/video/audio/ in a log message.

Implement more logical code flow.

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

Allow to factorize code in video_decode_example(), simplify.

Decrease confusion.

Factorize.

Fix crash in case frame is not defined (e.g. with muxing out.wav).

The API was never changed since 2003. Replace with a comment about the
performed operation.

Fixes Ticket1801
Based on suggestion from AztecC
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>