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When there is a lot of dense subtitle content, such as ASS subtitles converted from live bullet screen, the CPU usage rate is only 20%, and the encoding speed is very slow, probably only at a speed of 1x. However, when there are no subtitles or the subtitles are not dense, the speed can reach 5x and the CPU is fully loaded at 100%.
 

Using h264 or AMF has the same problem, and enable the OpenCL still the same.

 

ShanaEncoder version: 5.3.1.1

OS: windows 10 professional 22H2

CPU: AMD Ryzen 5800X

GPU: AMD 5700XT

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  • ?

    There is discussion bulletin for non-korean speakers.
    https://shana.pe.kr/shanaencoder_board_intl

     

    Hardburn with ASS_sub needs more process in general.
    Occasionally some instruction causes idle time that makes low CPU usage

     

    I had similar problem few years ago in Handbrake. My CPU was Intel though...

    Have you tried same encoding on ffmpeg?? You should test it for better answer :)

    g39.gif

  • ?
    DetectiveLemon 2023.05.07 16:47
    Sorry for posting this in the wrong place. Thank you very much for your suggestion. I gonna test it again with FFmpeg later.

  1. ShanaEncoder Translation 8

  2. This board is for users of the ShanaEncoder international version 7

  3. ICQ and CRF 0

  4. Would like to add task list export and import functionality. 0

  5. when doing complex ASS subtitles encoding, the CPU idle rate is high and the encoding speed is low. 2

  6. When to add GPU 2PSS qsv 2pass 1

  7. ShanaEncoder creates larger files than other encoders using the same parameters 1

  8. 5.3.1.1 bug feedback 02——abnormal frame rate identification 0

  9. Pause encoding instead of failing with error when disk gets full? 1

  10. Preservation of the list of added video files. 1

  11. 5.3.1.1版本 BUG反馈 01 ♦ 5.3.1.1 version bug feedback 01 1

  12. Need Help With SubTitles 3

  13. How to load/ include a "3DLut" in to my video for encoding? 1

  14. Translation fix in 5.3.0.1 1

  15. Show only available codecs (Intel Quick Sync not available) 0

  16. key frame not in seconds but as usual in frames 0

  17. Auto-adjust height when width is changed - Keep aspect ratio 0

  18. Request: Advanced Crop 0

  19. Request: Set maximum decibel 0

  20. Why not add H266 encoding function for ShanaEncoder? 0

  21. german Language 2

  22. Installation / No Access to Mirror 2

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