Ho to limit max bitrate?

rigaya / NVEnc

NVENCによる高速エンコードの性能実験

https://rigaya34589.blog.fc2.com/blog-category-17.html

Other

1.03k stars 108 forks source link

Ho to limit max bitrate? #554

Closed Einst1969 closed 2 months ago

Einst1969 commented 4 months ago

I think I have a problem with the wifi transmitting to my TV and I think the max bitrate is too high.

How can I put a maximum limit on the bitrate?

I tried "maxrate" and " "vbv-bufsize" but it doesn't seem to work. I don't understand what values to put.

rigaya commented 4 months ago

I think --max-bitrate (the unit is in kbps) should work, but only with --qvbr, --vbr or --cbr.

If using --cqp, it is not possible to limit bitrate, so please consider using other modes.

Einst1969 commented 4 months ago

It doesn't work with the CBR. Or am I doing something wrong?

rigaya commented 4 months ago

I've tested but it seems to work fine with command line below. x64\NVEncC64.exe -i input.ts -o output.mp4 --cbr 6000 --max-bitrate 6000

NVEncC (x64) 7.41 (r2681) by rigaya, Jan 22 2024 13:02:15 (VC 1929/Win)
OS Version     Windows 11 x64 (22631) [UTF-8]
CPU            12th Gen Intel Core i9-12900K [5.19GHz] (8P+8E,16C/24T)
GPU            #0: NVIDIA GeForce RTX 4080 (9728 cores, 2505 MHz)[PCIe4x16][551.23]
NVENC / CUDA   NVENC API 12.1, CUDA 12.4, schedule mode: auto

It's not exact but shall be enough.

Einst1969 commented 4 months ago

What program do you use to see the bitrate over time?

qwe7989199 commented 4 months ago

What program do you use to see the bitrate over time?

This will help to extract bitrate distribution as a csv file, so that you can visulize it in MS Excel or other tools.

rigaya commented 2 months ago

I’ll close this issue as the topic has been answered.