[FFmpeg-devel] [PATCH] libswscale/swscale_unscaled.c: UHD Resolution Performance Increase for Color Space Convertions / NVENC Related

[Michael Niedermayer]

On Mon, Oct 03, 2016 at 12:35:51PM +0300, Ali KIZIL wrote:
> Hello,
> 
> This patch is done for performance increase on UHD or above resolution
> color space convertions.
> Some SDI sources provide yuv422p10 for 10bit source and uyvy422 for 8 bit
> source.
> To encode these sources with NVENC 10 bits, there is a need to convert
> these color spaces to P010.
> 
> Before patch for UHD and above resolutions, convertion could not exceed
> ~25-30 fps, which can not be used for a 50 fps encoding.
> This patch fixes this problem.
> 
> Also, color space convertion speed for 10bit YUV422P to 8bit YUV420P is
> having the same problem.
> If anybody wants to encode 10 bits source in 8 bits for UHD or above
> resolutions could not achive high frame rate ratio as well.
> This patch also fixes this problem.
> 
> I think it will be good to apply this patch to avoid performance loss in
> high resolutions.
> 
> Kind Regards,

>  swscale_unscaled.c |  140 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 140 insertions(+)
> 5c347db66a9a32fbb91cd17ea768143bc768f948  0001-For-10bit-SDI-Sources-to-10bit-NVENC-Encode.patch
> From 9a680c588248abec30f7a4afdcf7a18c58766ade Mon Sep 17 00:00:00 2001
> From: Sayit BELET <admintv at encoder>
> Date: Mon, 3 Oct 2016 12:09:58 +0300
> Subject: [PATCH] For 10bit SDI Sources to 10bit NVENC Encode 10bit YUV422P to
>  P010 yuv422p10ToP010Wrapper

breaks fate


--- ./tests/ref/vsynth/vsynth1-vc2-422p10       2016-10-02 14:30:45.987076676 +0200
+++ tests/data/fate/vsynth1-vc2-422p10  2016-10-03 15:45:54.060991862 +0200
@@ -1,4 +1,4 @@
 88e3488e4689cf06e75959c71e2f9d96 *tests/data/fate/vsynth1-vc2-422p10.mov
 1684055 tests/data/fate/vsynth1-vc2-422p10.mov
-f35dd1c1df4726bb1d75d95e321b0698 *tests/data/fate/vsynth1-vc2-422p10.out.rawvideo
-stddev:    1.88 PSNR: 42.61 MAXDIFF:   23 bytes:  7603200/   760320
+3ed919ead3917805fcde08467b6c4907 *tests/data/fate/vsynth1-vc2-422p10.out.rawvideo
+stddev:    3.56 PSNR: 37.09 MAXDIFF:   38 bytes:  7603200/   760320
Test vsynth1-vc2-422p10 failed. Look at tests/data/fate/vsynth1-vc2-422p10.err for details.
make: *** [fate-vsynth1-vc2-422p10] Error 1
make: *** Waiting for unfinished jobs....

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Those who are best at talking, realize last or never when they are wrong.
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