iPhone HEVC .mov won’t import, it crashes VP18 (527)

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Former user wrote on 12/7/2021, 10:08 PM

@john_dennis That makes sense, everything i've read about HEVC says better compression for smaller files, so in my video above & as Rich has done, although it looks ok on screen quality will have been lost, noted 👍

I read that Wiki page, a lot went over my head to be honest & i might have missed it but you have the HEVC bitrate so is there a simple way to work out what the prerendered AVC bitrate should be?

john_dennis wrote on 12/7/2021, 11:16 PM

Perhaps someone has a ratio of HEVC to AVC bit rates for the same quality, but that someone ain’t me. The reason is that I’ve avoided HEVC for acquisition and delivery. Personally, I think society is working on the wrong solution to bandwidth problems with compression rather than working to deliver infinite bandwidth to every man, woman and child on the face of the earth.

if it was left to me GOP would always equal 1.

Former user wrote on 12/8/2021, 8:17 AM

@john_dennis 😂😂 Yeah I avoid & have none,

Musicvid wrote on 12/8/2021, 9:07 AM

@Rich Parry With a little bit of luck, there will soon be a LUT for iPhone Dolby Vision HLG -> REC 709, and I plan on using your sample for testing if it is alright with you.

https://www.vegascreativesoftware.info/us/forum/wanted-iphone-dolby-vision-samples-for-testing--133174/

JS2019 wrote on 12/8/2021, 3:26 PM

@Rich Parry

Hi Rich, your data rates should be fine, the benefits of hevc vs avc diminishes rapidly at higher data rates, see this old thread … https://www.vegascreativesoftware.info/us/forum/4k-uhd-hdr10-hevc-bitrate-calculator-for-point-of-diminishing-returns--129656/#ca805900

 

Rich Parry wrote on 12/9/2021, 4:32 PM

As the original poster to this thread, I wanted to correct some of what I said. I said Handbreak and HOS Import Assist did not work, this was incorrect. My lack of expertise with these tools led me to say that. I have since verified both work great, my apologies to @wwaag et. al.

As stated above, my problem was solved updating the video driver, so the tools were not needed, although I did find them useful and learned a lot along the way.

Rich

Last changed by Rich Parry on 12/9/2021, 4:35 PM, changed a total of 1 times.

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Howard-Vigorita wrote on 12/10/2021, 10:32 AM

@john_dennis said: Perhaps someone has a ratio of HEVC to AVC bit rates for the same quality, but that someone ain’t me. The reason is that I’ve avoided HEVC for acquisition and delivery. Personally, I think society is working on the wrong solution to bandwidth problems with compression rather than working to deliver infinite bandwidth to every man, woman and child on the face of the earth.

if it was left to me GOP would always equal 1.

The rule of thumb I hear most often is 20%. Not sure ffmetrics testing bears that out but I am able to get true lossless and higher bitrates with hevc and edit with Vegas. Theoretically near lossless or high bitrate avc should come close, but as a practical matter... good luck with that.

john_dennis wrote on 12/10/2021, 2:05 PM

@Howard-Vigorita

Based on FHD renders measured with Wayne's measurement tool:

It hardly seems worth the hassle to me, if you factor in all the hardware that won't play HEVC.

From UHD XAVC-S source rendered Vegas Pro 19-424 using default Magic Internet templates except Preset changed to High Quality.

Former user wrote on 12/10/2021, 7:49 PM

@Howard-Vigorita

Based on FHD renders measured with Wayne's measurement tool:

It hardly seems worth the hassle to me, if you factor in all the hardware that won't play HEVC.

@john_dennis I used to use HEVC CRF24, (that's about equal to AVC CRF21) for archiving, so a high quality reproduction but not lossless, but it was good enough, most likely never have to look at those files again, but tiny chance I'd have to re-edit from them files in the future

Original files are 1080P30 AVC 6000kbit/s CBR

HEVC file sizes are hugely dependent on amount of motion, in the example screen shot there is only slight motion in most of the videos, but note the 2nd file actually increases in size. This was a rare case of a mobile camera without great stabilization throughout the video, and the HEVC encode dutifully reproducing the low bitrate artifacts.