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stairs artifact
I found really wired stairs artifact from top left and go right cross the video in encoded video
start in 53-56s
source video is fine and output from x264 is also fine
I did tests on x265 1.9 and git version
and outputs are same
source video
http://www.mdragon.org/test/test60.ts
encoded video
http://www.mdragon.org/test/encoded.mp4
ffmpeg -i test60.ts -f yuv4mpegpipe -pix_fmt yuv420p - | x265 --y4m -o encoded.265 -
ffmpeg -i encoded.265 -c copy encoded.mp4
I also did try preset veryslow with same result
Comments (9)
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reporter -
reporter - edited description
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reporter - changed title to stairs artifact
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What bitrate/CRF are you encoding this at? Did you try lowering the CRF?
The default CRF values are very different across x264 and x265 in terms of impact on bitrate.
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ffmpeg -i test60.ts -f yuv4mpegpipe -pix_fmt yuv420p - | x265 --y4m -o encoded.265 -
So x265 default value
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reporter same result with --bitrate 2000 --slow
and same result with --crf 32 --slow
I also get same result if I use gstreamer with x265enc plugins
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reporter - changed version to 1.9
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I cannot reproduce this: If I watch it in MPC-HC or in VLC, this very frame doesn't show these artefacts (yes, I am looking at encoded.mp4): Therefore my guess is that this is just an issue in the HEVC decoder used to play encoded.mp4 and no issue in x265.
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reporter - edited description
- changed status to invalid
decoder problem
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