Some fixes by Stefano.
For detailed authorship see SOC repo
Signed-off-by: Anton Khirnov <anton@khirnov.net>

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

Code mostly copied from libx264 wrapper.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Signed-off-by: Diego Biurrun <diego@biurrun.de>

Also trim some redundant stream specifiers descriptions.

They are misleading and carry no useful information.

Add a per-stream -filter option, make -vf an alias for -filter:v. Move
vfilters to the options context.

It's redundant -- -flags +psnr does the same thing.

It's only shadowing the AVOption with the same name.

Also remove redundant -pix_fmt list syntax, it's inconsistent and  only
makes the code more complicated. -pix_fmts should be enough for
everyone.

Merge video_qscale (set by -qscale) and audio_qscale (set by -aq) into
one 'qscale' field in the options context. Add a shortcut -q for -qscale
and make -aq an alias for -q:a.

Remove now redundant (and broken/undocumented) opt_programid.

Also document it and replace undocumented and inconsistent
'-sample_fmt list' syntax with -sample_fmts.

When reporting continuity error show pid, expected and received cc.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Prevent false positive continuity counter error logs.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

In order to build C++ programs using libav you need
-D__STDC_CONSTANT_MACROS appened to the CXXFLAGS.

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

They are redundant, the same can be now accomplished with -metadata.

Add a new -tag option, make -[vas]tag an alias for -tag:[vas]