Changes between Version 16 and Version 17 of Scaling

Timestamp:

Sep 7, 2021, 5:10:28 PM (5 years ago)

Author:

Balling

Comment:

--

Scaling

@@ -9 +9 @@
 ffmpeg -i input.mp4 -vf scale=320:240,setsar=1:1 output.mp4
 }}}
+* When going from BGR (not RGB) to yuv420p the conversion is broken (off-by-one). Use -vf scale flags=accurate_rnd to fix that.
+* yuvjxxxp pixel formats are deprecated. Yet for x265 the workaround was implemented, but not for jpeg2000 and AV1. For those -vf scale=out_range=pc should be used.
+* Converion from YCbCr limited to RGB 16 bit is broken, use zscale instead of swscale
+* Limited range RGB is not supported at all.
+* Dither can be turned off using -vf scale=sws_dither=none
+* One should always remember that YCbCr 4:4:4 is not enough to preserve RGB 8 bit, YCbCr 10 bit are required.  
 }}}