I always render in 4K @ 59.94 FPS. My source files from my DJI drone are 4k 59.94 at HEVC 120Mbps
XAVC-S Renders with an average bit-rate of 166Mbps.
My Magix Mainconcept HEVC Template uses a CBR of 240Mbps.
Am I assuming correctly that the HEVC template should/will yield higher quality render results?
@LongIslander Hi, if you can supply a short sample clip of source material, ideally less than a minute, or 30 seconds or less, and give a screenshot of the two render templates in question, i.e. XAVC-S and MC Cbr, I can test. Without the sample piece I can still check your render templates against each other, but i’ll be testing different source, but that probably doesn’t matter, it really will still give you the same answer.
There are a lot of quality comparison tables available in my profile link, but none for CBR. This screenshot does have comparisons using Nvenc and includes CBR.
I analyzed your 240 frame clip using Wayne Waag's Render Quality Metrics tool with the following results:
XAVC
HEVC (240 Frames)
The results were incoherent because the HEVC render is not a frame accurate match to the original clip.
HEVC (208 Frames Best Fit)
After aligning the shorter HEVC render for the lowest visible difference when viewed on the Vegas timeline, this is the resulting RQM measurement.
My Opinion
The difference in quality is about equal to a FFIAWT. The decision of which template to use should be made on other factors.
For a short while, my rendered files will be available for download here:
https://drive.google.com/drive/folders/11ScOBXF8Tm_hbKA6RHii-2lXJrJw2lyE?usp=sharing
Ok, You got me. FFIAWT?
With a little manipulation, I was able to get frame accuracy on the three tracks. Often, when quality metrics are ambiguous, it is most telling to revert to the old visual enhanced difference comparison.
On doing that, at 25,600% enhancement, there are no differences between the two codecs at the bitrates you mentioned, save for a very random pixel or two. For any significant comparison, both are 100% accurate and lossless. One example is shown below.
Thank you! when you talk about frame accuracy what do you mean if you could elaborate a little more for me thanks.
why wouldn't the frames match I have quantize to frame set to on? Could this be fixed in a future bug release?
Your DJI source is 59.000 fps. That is a non-standard framerate, which many encoders will not render, but will default to 59.940. That's all, pay no attention to the man behind the curtain.
@LongIslander Hi Longislander, only got back a little while ago. When I rendered out .mxf on VP17 it was unuseable, just mainly green. VP16 is ok though.
There's really nothing in it.