Jitsi-meet-torture missing the video resources/psnr/psnr-input.y4m

Dear all,
I try to run the PSNR test in jitsi-meet-torture. I found that there is no video needed by this test. I don’t replace its name with the name of other / existing video just because I think you should use some special video shouldn’t you? Otherwise how can you identify/synchronize the saved / received frame to compare (and calculate the PSNR value) with its counterpart transmitted frame ?
So please send me the video or please shed some light on this frame synchronization.
Many thanks

You can build your own jitsi-meet-torture/psnr-build-resources.sh at master · jitsi/jitsi-meet-torture · GitHub