Jim Worrall wrote:
Ouch, did the new file show as 709 with
ffmpeg -i newfile.mkv
I can't reproduce this one myself x265-params seems to work.
If for some reason the newfile didn't get flagged as 709 then it could be
possible to get brighter with different colours in a scene.
Yes. The ORIGINAL source file gives
Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9],
23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc
The transcode with the x265-params gives
Stream #0:0(eng): Video: hevc (Main), yuv420p(tv, bt709), 1920x1080 [SAR 1:1
DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
Could the problem be that the input is not recognized as bt709, even though it
is?
Yes, that's probably it.
Maybe you could try below to see if the original shows 709 -
ffmpeg -analyzeduration 100M -probesize 100M -i original.m2ts
FWIW I just noticed another issue - using pass 1 and pass 2 via ffmpeg
doesn't work for libx265.
It does work if you use it via -x265-params pass=
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