This avoids invalid free when the stream id doesn't match the packet
stream index.

Ticket #2501

CC are not marked. Also allow potential mixed types later.

This is mostly automated global search and replace

The deprecated aconvert filter is disabled, if it still has users
it should be updated

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

A broken packet with invalid data in the middle of the stream
should not prevent from decoding the rest of the file.

Work around trac ticket #2264.

Fix invalid memory accesses.

This is following 568c70e7.

Make the filter accept named options for the first argument, and update
documentation accordingly.

This allows the iteration callbacks to discover the internal class and
options, and show them when required.

This reduces from 3 to 2 messages for the same syntax error in ffprobe,
and from 4 to 3 in filters.

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

The macro can be used to define consistently the internal class of a
filter, save some typing and factorize.

While here:
    - add missing .version and .category,
    - make .class_name consistent across filters,
    - align declarations.

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

avfilter_default_filter_name() is supposed to access an AVFilterContext
struct, if used with a private struct it will cause a crash since it will
access fields which are non defined in the private struct.

The function is modelled after av_default_item_name(), and will print the
name of the instance filter if defined, otherwise the name of the filter.

This allows to show the instance name in the log, which is useful when
debugging complex filter graphs.

Allow to specify the display aspect ratio adopted for rendering
subtitles.

Previously it was using the same value of the input video DAR, which is
inconsistent with most implementations.

Fix trac ticket #1098.

Found-by: REN Lifeng <renlifeng@wowfly.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>