search

watery01 / libyuv

Automatically exported from code.google.com/p/libyuv
0 stars 0 forks source link

psnr (ssim) use pipe #215

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
When evaluating the quality of webp, a tool that can measure quality is useful.
At google we use psnr, which does ssim and others.  But it requires 2 yuv files.
When the 2 yuv files exceed your disk space, its not possible
Can you make psnr tool, or something like it, accept a piped input?

We're talking files approaching 1 TB and multiple transcodes, so today, thats a 
size and performance limitation.

(moved from https://code.google.com/p/webp/issues/detail?id=90)

Original issue reported on code.google.com by fbarch...@chromium.org on 4 Apr 2013 at 4:02

GoogleCodeExporter commented 9 years ago 
Wont fix for now.
In cases of x264 and vpxenc, use the psnr/ssim those tools provide to avoid 
decode and psnr.
As work around for disc space decode a limited range of file.

Reopen if pipe is compelling.

Original comment by fbarch...@google.com on 21 May 2013 at 6:48