Vegas pro is rendering it WAY higher a bit rate than specified.

Trogdor8freebird wrote on 8/6/2017, 9:59 AM

It seems to only do this with the HEVC codec but I specify for it to use 28 Mbps CBR, then in the properties (after video's rendered) it says 120 Mbps and the file size is 4.84GB for a video where the source was 2.08GB.

This is frustrating- I'm trying to transcode to HEVC specifically because it's able to have a lower bit rate while having high quality.

The source file resolution was 1440x900, there is a jump to 1600x900 but that'd be a very small change. Source file was also 60 fps.

Otherwise, here are my settings.

Comments

Kinvermark wrote on 8/6/2017, 10:39 AM

What happens if you use one of the standard templates for intel HEVC? Say 1920x1080 60p?

Trogdor8freebird wrote on 8/6/2017, 10:44 AM

What happens if you use one of the standard templates for intel HEVC? Say 1920x1080 60p?

I don't know but it takes quite a while for my rig to render it and I wouldn't imagine it would end up being a solution. Still, I'd be willing to try it. Do you want me to?

Cornico wrote on 8/6/2017, 11:25 AM

For comparison no need to render the whole project. Select a small part and render the selection only with your template and with the suggested one.

Trogdor8freebird wrote on 8/7/2017, 12:35 AM

Sorry about the long delay. I forgot about this thread until I after woke up earlier.

What happens if you use one of the standard templates for intel HEVC? Say 1920x1080 60p?

It's really strange. Using that 28 mbps 900p60 profile that I used, it was 120 Mbps in final render but the 1080p60 preset for 20mbps was still extremely off, although not in the same direction. It was around 1.8 mbps. I don't understand why it's going so far up and down with its bit rate.

Marco. wrote on 8/7/2017, 3:03 AM

Yes, there is something going wrong with constant bitrate for HEVC rendering (though I wouldn't use constant bitrate for HEVC or AVC render at all, these codecs are optimized for variable bitrates).

Trogdor8freebird wrote on 8/7/2017, 5:04 AM

Yes, there is something going wrong with constant bitrate for HEVC rendering (though I wouldn't use constant bitrate for HEVC or AVC render at all, these codecs are optimized for variable bitrates).

I tried that as well (although I've had a lot of trouble in the past with AVC VBR, wouldn't expect the same trouble from this though). That's actually what the presets are but as mentioned in my latest comment, it appears to do the inverse of what CBR did for me. Instead of an unnecessarily high bit rate, it uses a very low bit rate (instead of the 20 avg 40 max that the 20 mbps preset says, it ended up at 1.8 mbps).

I definitely prefer it to go lower than higher, and I was able to mess around with it to get ~3 mbps but it'd still be nice if I could use something more in the middle (like 5, 10, 20, or 25).