1660 Ti : slow rendering and hiccups every 60 frames?

troyX wrote on 6/28/2019, 9:58 PM

Hello everyone,

I'm using Vegas Pro 15 to create videos for my YouTube channel, and I could use your help, since I must be doing something wrong with my settings. I just bought an Nvidia 1660 Ti, in order to benefit from the new NVENC encoder. OBS works perfectly (no overload, good image quality), but Vegas Pro is giving me a hard time.

First, the timeline sometimes lags, and has trouble previewing the video, displaying 3 little dots next to the frame number (...). Reducing the preview quality is still an option, but I used to be able to do it flawlessly with a less performing card. Second, I can't seem to get 1:1 rendering. It's just as slow as it was with my RX 580 4GB. I use the following settings :

- MAGIX AVC

- Internet HD 1080p 59.94 fps (NVIDIA NVENC)

- High profile

- Bitrate 20 mbps average/30 mpbs max

- NV Encoding

- Default encoding setting

- RC Mode : VBR

I can live with the 1 minute and 12 seconds of encoding for 1 minute of footage (although I'd appreciate a solution if you've got one, I was led to believe the Turing NVENC was super efficient to encode), but what happens is every time Vegas has processed precisely 60 frames, it'll stop for a split second before encoding the next 60 frames. My RX 580 used to encode every single frame in a row, if that makes sense. Is that normal behavior for the 1660 Ti?

Thanking you in advance!

Comments

Musicvid wrote on 6/28/2019, 10:09 PM

You have a source frame rate mismatch.

Don't record YouTube with OBS.

Download with 4k Video Downloader.

Then post this information.

https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

fr0sty wrote on 6/29/2019, 4:39 AM

Nvidia GPUs currently do that in Vegas, no matter which one you use. They encode a batch of frames, then there seems to be some sort of buffering/dumping process that happens after, and it encodes the next batch. That said, when compared against AMD cards that do not have this pause, the end result render times are similar for cards of similar capabilities.

The 10 series GTX cards didn't see much of a NVENC performance boost, but the 20 series did see some improvement from what I gather.

troyX wrote on 6/29/2019, 6:11 AM

@fr0sty: Good to know, thank you!

@Musicvid : I think you misunderstood the issue, I use game footage that I record with OBS, and I encode it through Vegas.

j-v wrote on 6/29/2019, 7:37 AM

@troyX

That behaviour of NVENC is normal, but why do you use those pretty high default bitrate?
These are mine for that kind of footage

with this rendertime for 1 minute footage on laptop from signature

troyX wrote on 6/29/2019, 1:59 PM

Hey,

I just tried your exact settings : for a 3-minute video, it takes Vegas 4 minutes to encode :( Is there any way I can get 1:1?

j-v wrote on 6/29/2019, 2:41 PM

( Is there any way I can get 1:1?

That depends on your used hardware, its setup and maybe the used drivers.