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S
sanderc20817584
Participating Frequently
February 15, 2020
Question

Premiere Pro Version 14 2020 Update CBR Ignored

  • February 15, 2020
  • 2 replies
  • 2095 views

So I was testing on my PC and laptop version 14 of Adobe premiere and found out that CBR or constant bitrate is not working. multiple times I have rendered a video and a setting of 100 mbps with H.265 and H.264 at both 1080p and 4K and even 8K. but the export result is never matching up to the setting instead the rendered video is about 20 mbps when viewing in File Explorer. I bet version 14 is trying to save space sadly this is not how CBR is supposed to work.

 

The reason I export at a high bitrate is so that You Tube compression doesn't ruin it but now it doesn't seem to do more than the absolute necessary. I notice that no matter if the setting was VBR or CBR when both settings are set at for example 100 mbps and there is a still image on the screen the bitrate drops dramatically which is normal in VBR however even that is not supposed to drop below to target bitrate but for CBR this is not normal.

 

when I went back to version 13 this problem was fixed so please Adobe tell me what is going on?

 

Also after a render upon closing Premiere I get a crash and it asks to report the crash to Adobe.

This topic has been closed for replies.

2 replies

Stan Jones
Community Expert
Stan JonesCommunity Expert
Community Expert
February 17, 2020

I don't know the why or whether some encoders are diffeerent than others, but I suspect that there is no difference between PR versions. If a still image requires only x pixels to encode it as uncompressed, then the encoder must not be adding extra pixels just to pad the export. In exporting from 2019.1.5, my sequence of all stills (1920x1080) allowed setting to CBR 100 (once I increase the level to 6.0), but only exports it at about 10. When I use a video, it uses all 100.

 

Stan 

R
RjL190365
Legend
February 15, 2020

Are you using an Intel CPU? If so, you have run up against the maximum bitrate limit of Adobe's implementation of the Intel QuickSync encoder. It has a maximum supported export bitrate of only about 50 to 60 Mbps. However, the 100 Mbps substantially exceeds the maximum supported total bitrate of the encoder. In such an instance, the encoder will default to a low VBR bitrate of about 15 to 20 Mbps.

 

The only way to fix that, unfortunately, is to switch the encoder export setting from "hardware encoding" to "software encoding."

S
sanderc20817584Author
Participating Frequently
February 15, 2020

I said both laptop and PC. PC is 3900X Ryzen and Laptop is 9750H Intel both same issue on 14 and solved on 13.

R
RjL190365
Legend
February 15, 2020

Actually, 13.1.5 has the very same problem (this problem was introduced with the 13.1 version of Premiere Pro). 13.0 is now no longer available for download via the Creative Cloud desktop app.

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