fftools/ffmpeg: deprecate -psnr

It is entirely redundant with -flags +psnr.

1 files changed, 2 insertions, 1 deletions

diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi
index 0e657b0138..974d1c108f 100644
--- a/doc/ffmpeg.texi
+++ b/doc/ffmpeg.texi
@@ -992,7 +992,8 @@ to keep the interlaced format for minimum losses.
 The alternative is to deinterlace the input stream by use of a filter
 such as @code{yadif} or @code{bwdif}, but deinterlacing introduces losses.
 @item -psnr
-Calculate PSNR of compressed frames.
+Calculate PSNR of compressed frames. This option is deprecated, pass the
+PSNR flag to the encoder instead, using @code{-flags +psnr}.
 @item -vstats
 Dump video coding statistics to @file{vstats_HHMMSS.log}.
 @item -vstats_file @var{file}