getting ssim and psnr from ffmpeg with NV hw decoder/encoder

[Vincent Vega]

i'd like to transcode a video to h264 with NVidia card hardware, and get psnr and ssim metrics in output log, using ffmpeg. what would be the command line? it seems like a most basic task, but i just cant seem to find a way to make it work)

[benwaggoner]

i'd like to transcode a video to h264 with NVidia card hardware, and get psnr and ssim metrics in output log, using ffmpeg. what would be the command line? it seems like a most basic task, but i just cant seem to find a way to make it work)
You should be able to use "--psnr --ssim --csv-log-level 2 --csv foo.csv" in ffmpeg. That'll give you a line per frame listing several flavors of PSNR and SSIM for each.