Hi!
In x264.h I have found:
/* In: optional array of flags for each macroblock.
* Allows specifying additional information for the encoder such as
which macroblocks
* remain unchanged. Usable flags are listed below.
* x264_param_t.analyse.b_mb_info must be set to use this, since x264
needs to track
* extra data internally to make full use of this information.
*
* Out: if b_mb_info_update is set, x264 will update this array as a result
of encoding.
*
* For "MBINFO_CONSTANT", it will remove this flag on any macroblock
whose decoded
* pixels have changed. This can be useful for e.g. noting which
areas of the
* frame need to actually be blitted. Note: this intentionally ignores
the effects
* of deblocking for the current frame, which should be fine unless
one needs exact
* pixel-perfect accuracy.
*
* Results for MBINFO_CONSTANT are currently only set for P-frames,
and are not
* guaranteed to enumerate all blocks which haven't changed. (There
may be false
* negatives, but no false positives.)
*/
uint8_t *mb_info;
/* In: optional callback to free mb_info when used. */
void (*mb_info_free)( void* );
/* The macroblock is constant and remains unchanged from the previous
frame. */
#define X264_MBINFO_CONSTANT (1<<0)
/* More flags may be added in the future. */
As I understand this is ability to say encoder, what MB are not changed.
How to use this feature via ffmpeg C API ?
--
Nikita Orlov
Skype: nik_stet
QQ: 2717846083
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