[FFmpeg-devel] [PATCH 1/2] libavfilter/scale: More descriptive in/ref/out logging

Michael Niedermayer michael at niedermayer.cc
Tue Jun 6 18:49:11 EEST 2017

On Mon, Jun 05, 2017 at 06:55:20AM -0400, Kevin Mark wrote:
> This change makes it more clear when using the scale and scale2ref
> filters what is actually happening. The old format did not
> differentiate between scale and scale2ref which would make it seem
> that, when using scale2ref, the ref was what was truly being scaled.
> Old format for both scale and scale2ref:
> w:640 h:360 fmt:rgb24 sar:1/1 -> w:160 h:120 fmt:rgb24 sar:4/3 flags:0x2
> The left side is the input and the right side is the output. While
> this is sufficiently clear for scale, for scale2ref it appears to
> conflate the main input with the reference input. To be fair that is
> exactly what the code is doing (and on purpose) but that's not a very
> intuitive implementation detail to expose to the user. Now that the
> main input's constants are exposed in scale2ref it makes even more
> sense to correct this.
> New format for scale:
> in  w:320 h:240 fmt:rgb24 sar:1/1
> out w:80 h:60 fmt:rgb24 sar:1/1 flags:0xc0000
> New format for scale2ref:
> in  w:320 h:240 fmt:rgb24 sar:1/1
> ref w:640 h:360 fmt:rgb24 sar:1/1
> out w:160 h:120 fmt:rgb24 sar:4/3 flags:0x2
> The increase in clarity is self-evident.

yes but its much harder to grep for as its not a single line anymore

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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