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    Jellyfin Forum Support Troubleshooting SOLVED: Bad transcoding performance using Intel UHD 770

     
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    SOLVED: Bad transcoding performance using Intel UHD 770

    nyanmisaka
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    Posts: 253
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    Joined: 2023 Jun
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    #3
    2025-03-19, 03:03 PM (This post was last modified: 2025-03-19, 03:05 PM by nyanmisaka. Edited 2 times in total.)
    This appears to be a slowdown caused by I/O. You can try the following command to rule out the problem.

    Test QSV decoder:
    Code:
    /usr/lib/jellyfin-ffmpeg/ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128,driver=iHD -init_hw_device qsv=qs@va -filter_hw_device qs -hwaccel qsv -hwaccel_output_format qsv -noautorotate -c:v hevc_qsv -i file:"/media/data/Series/episode.mkv" -an -sn -f null -

    Test QSV encoder:
    Code:
    /usr/lib/jellyfin-ffmpeg/ffmpeg -init_hw_device vaapi=va:/dev/dri/renderD128,driver=iHD -init_hw_device qsv=qs@va -filter_hw_device qs -f lavfi -i nullsrc=s=3840x1606,format=nv12 -c:v hevc_qsv -low_power 1 -preset veryfast -b:v 14616000 -maxrate 14616000 -bufsize 29232000 -profile:v main -level 50 -g:v 72 -keyint_min:v 72 -f null -
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    Messages In This Thread
    Bad transcoding performance using Intel UHD 770 - by fl0wfr - 2025-03-19, 08:49 AM
    RE: Bad transcoding performance using Intel UHD 770 - by TheDreadPirate - 2025-03-19, 12:42 PM
    RE: Bad transcoding performance using Intel UHD 770 - by nyanmisaka - 2025-03-19, 03:03 PM
    RE: Bad transcoding performance using Intel UHD 770 - by fl0wfr - 2025-03-19, 07:06 PM
    RE: Bad transcoding performance using Intel UHD 770 - by nyanmisaka - 2025-03-20, 11:39 AM
    RE: Bad transcoding performance using Intel UHD 770 - by fl0wfr - 2025-03-20, 02:08 PM
    RE: Bad transcoding performance using Intel UHD 770 - by fl0wfr - 2025-03-20, 12:26 PM
    RE: Bad transcoding performance using Intel UHD 770 - by nyanmisaka - 2025-03-20, 03:43 PM

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