Down-scale videos before encoding with AV1 ?!

[Mourad AKLOUF]

Hello;

After successfully encoding a CIF video with AV1 Codec  ,I am trying to encode a 4K video now , but i found that the encoding doesn't work with bigger resolutions ( bigger then 1292x1080) , this is what  i use:

  aomenc.exe --passes=2 --pass=1 --end-usage=q --cq-level=58  --width=3840  --height=2160 --fpf=aom_QP58.log --cpu-used=4 --threads=8  --kf-min-dist=64 --kf-max-dist=64 --psnr --limit=600 --fps=60/1 --bit-depth=10   -o output_QP58.webm aylightRoad2_3840x2160_60fps_10bit_420.yuv 2> logs_QP58_pass1.txt

  aomenc.exe --passes=2 --pass=2 --end-usage=q --cq-level=58  --width=3840  --height=2160 --fpf=aom_QP58.log --cpu-used=4 --threads=8  --kf-min-dist=64 --kf-max-dist=64 --psnr --limit=600 --fps=60/1 --bit-depth=10   -o output_QP58.webm DaylightRoad2_3840x2160_60fps_10bit_420.yuv 2> logs_QP58.txt

logs_QP58_pass1.txt is empty, and  in logs_QP58.txt there is  :

Failed to initialize encoder: Invalid parameter

    rc_twopass_stats_in requires at least two packets.

but when i replace : --width=3840  --height=2160  by --width=1920 --height=1080 it works fine ;

So do we have to down-scale videos before encoding with AV1 ; or i missed some input arguments ?

[Thomas Daede]

It's likely your first pass did not complete successfully. Is there
anything interesting in logs_QP58_pass1.txt?

AV1 should support 4k fine.

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[Mourad AKLOUF]

No logs_QP58_pass1.txt is also empty , yeah the 1st pass was not done properly

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