encode is hung when used with intra-period >150

[XuShiSheng]

Hi, I found that svt-vp9 is likely to get stuck used with intra-period >150, please take a look and let me know if I understand it wrong. @tianjunwork

• FFmpeg cli
  ./ffmpeg -i input -r 30/1 -vsync 2 -copyts -filter_complex "[0]scale=w=1920:h=1080:flags=lanczos[scale_1_out]" -map [scale_1_out]:v? -an -pix_fmt yuv420p -color_primaries bt709 -colorspacebt709 -color_trc iec61966-2-1 -color_range 0 -vcodec libsvt_vp9 -preset 8 -rc 2 -g 250 -vb 4000k output.mp4

• test seq
  https://share.weiyun.com/fPZbLH6k

• Other info
  Number of logical cores available: 24
  Number of PPCS 37
  SVT [config]: Profile [0] Level (auto)
  SVT [config]: EncoderMode / Tune : 8 / 0
  SVT [config]: EncoderBitDepth : 8
  SVT [config]: SourceWidth / SourceHeight : 1920 / 1080
  SVT [config]: Fps_Numerator / Fps_Denominator / Gop Size : 30 / 1 / 250
  SVT [config]: HierarchicalLevels / BaseLayerSwitchMode / PredStructure : 3 / 0 / 2
  SVT [config]: RCMode / TargetBitrate : CBR / 4000000

[tianjunwork]

Below configs match your setting with ffmpeg. Hang can be reproduced every time with -rc 2.
./SvtVp9EncApp -i ../../../../yuv/bbb_1920x1080_420p.yuv -w 1920 -h 1080 -intra-period 249 -lp 24 -enc-mode 8 -tune 0 -fps 30 -rc 2

-rc 1 also hangs but with a much lower chance.
./SvtVp9EncApp -i ../../../../yuv/bbb_1920x1080_420p.yuv -w 1920 -h 1080 -intra-period 249 -lp 24 -enc-mode 8 -tune 0 -fps 30 -rc 1

We will look into it. Thanks for reporting.