[FFmpeg-devel] [PATCH][libavfilter] codecview: improved options

[Davinder Singh]

separated motion vector types (forward or backward) from frame picture
types as MVs are associated with picture types only in video coding.

option `mv` can have two values:
forward predicted or backward predicted.

option `frames` can have three values:
p-frames, i-frames and b-frames.

ex:
only forward predicted mvs of all frames:
-vf codecview=mv=fp

mvs (both forward or backward predicted) of P or B-frames:
-vf codecview=mv=fp+bp:frames=pf+bf

Regards,
DSM_
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