-
Bitrate advice
I’m suddenly back to transcoding my AVCHD(1080P) footage to a mezzanine codec in order to get it into PPro 2018 until I can upgrade to Windows 10, and a question I had long ago has raised it’s head –
Is there any reason to transcode into a much higher bitrate than my source footage was shot at(24Mb/s)? The final output will be for web use only.
Steve Brame
creative illusions Productions -
3 Replies
-
Well, the timeline output will be for YouTube, so YouTube will do it’s own transcode upon upload, but no more than that. I’m mostly concerned with disk space, and wondering if high bitrate ingest transcodes provide a big enough advantage compared to the sheer size of the files created, or if it’s a ‘diminishing returns’ thing.
Steve Brame
creative illusions Productions -
it is a multi-generational quality loss of diminishing returns.
you should be able to get away with a dnxhd SQ/prores 422,cineform level 2 all good for about 2 generations of exporting while keeping space to a minimum.for example, the prores 422 LT might be acceptable or the regular or HQ depending on how much grading you need. or dnxhd LB or SQ, or cineform level 2 or 3. you can read their whitepapers available online. do a quick 10 sec. test to see.
-
Thanks Chris! I actually have been testing for the past few days between Avid and Cineform presets, and I really haven’t been able to visually differentiate between them. I’ve really been leaning toward Avid LB, since it’s still a higher bitrate than my source files. Today I’ll test my normal encode path, which is from the timeline to a YouTube preset, then upload to YouTube and let them do their transcode and see if there are any issues.
Steve Brame
creative illusions Productions
Reply to this Discussion! Login or Sign Up