Feng-AMD

1. Please refer to "https://github.com/GPUOpen-LibrariesAndSDKs/AMF/wiki/Rate%20Control%20Methods" for the explanation of of how AMF QVBR mode works - In QVBR mode, the file size is purely decided by the set quality level...

As stated in the document "https://github.com/GPUOpen-LibrariesAndSDKs/AMF/wiki/Rate%20Control%20Methods", in HQVBR mode, "To guarantee the minimum perceptual quality, and to avoid wasting bit budget, the bitrate accuracy at extremely low/high target bitrate will...

1. qvbr and hqvbr provide users extra options of balancing bitrate and quality, with emphasis on perceptual quality. 2. If users want rc with high bitrate accuracy, there is another...

I tried the above hqvbr command line with the latest ffmpeg build, "ffmpeg-2025-02-24-git-6232f416b1-full_build", and the resultant bitrate is 21.39Mbps, which is close to 20Mbps. If you use "-rc vbr_peak", you...

Please be informed that all the preanalysis tools (except qvbr/hqvbr)stated in "https://github.com/GPUOpen-LibrariesAndSDKs/AMF/wiki/AMF%20Encoder%20Settings%20and%20Tuning%20in%20FFmpeg" work with RC mode of vbr_peak. By the way I tested the above in Windows. I will try...

@Ryu0833 : I have tested using your settings and command line, with RX 5500 XT. Unfortunately I could not reproduce the issue you have mentioned. In order for us to...