0

My scenario is as follows:

  • Working with large original 8K file, captured at 100Mb/sec with hvec (h265) codec
  • The file was reencoded at 50Mb/sec for a reasonable balance between size and quality

Now there's a requirement is to lower the bitrate for space savings, going to 40Mb/sec.

My questions are:

  • Is there a benefit to go back to the original file and reencode it at 40Mb/sec bitrate, vs. using the already reduced 50Mb/sec file and reencoding that one at 40Mb/sec?
  • If there's indeed such a benefit, can we quantify it in comparison to the intermediate bitrate version of the file?
  • If there was a follow-up requirement to further reduce the bitrate to 30Mb/sec, what would be the benefit of going with the 40, 50, or the 100Mb/sec versions?

For reference, ffmpeg would be the encoding tool, using similar options to those listed below:

-c:v hevc_nvenc -preset p6 -tune hq -b:v 40M

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.