1 Topic by getitall (edited by getitall 07-10-2020 22:27:52)

  • Thanks: 3

Topic: unable to transcode with H264 NVENC or Quicksync

Hi there, I have one video (originally H265 coded) cannot be transcode using H264 NVENC or Quicksync,  using H265  NVENC is fine,  H265 quicksync seem to hang after 1 second. (other videos transcode fine without problem), 

I checked in to the log and in H264 HVENC it says no HVENC device found, in H264 quick sync it says pixel format is not support by QSV,  then both methods report error in intermediate file temporary mkv file then failed.  H265 quicksync show no error (just hang)

in SVP system log for all of the above the only things looks strange is "Transcoder: mpv failed with code 2"

Any suggestion what went wrong?

  • MAG79
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Re: unable to transcode with H264 NVENC or Quicksync

We need more info about your setup and file properties.
Please send us a problem report via SVP-manager.

  • Thanks: 3

Re: unable to transcode with H264 NVENC or Quicksync

submitted, thanks

  • Thanks: 3

Re: unable to transcode with H264 NVENC or Quicksync

i further confirmed almost all x265 H265 coded video cannot be transcoded by H264 HEVC or H264 quicksync,  only H265 HEVC,  is this problem with SVP or ffmpeg?

Re: unable to transcode with H264 NVENC or Quicksync

which means QS and NVENC h264 doesn't accept 10-bit input
but you can always encode in 8-bit

  • Thanks: 3

Re: unable to transcode with H264 NVENC or Quicksync

good tip! I will try that