avformat/aviobuf: check if requested seekback buffer is already read

[ffmpeg] / doc / rate_distortion.txt

diff --git a/doc/rate_distortion.txt b/doc/rate_distortion.txt
index 5f19b0d2ea981c1664e06e319e1c3f2ba8827732..e9711c2d5ca36fb4091af0f9cb1064ffdd83560b 100644 (file)
--- a/doc/rate_distortion.txt
+++ b/doc/rate_distortion.txt
@@ -21,8 +21,10 @@ Let's consider the problem of minimizing:
 
   distortion + lambda*rate
 
-For a fixed lambda, rate would represent the filesize, while distortion is
-the quality. Is this equivalent to finding the best quality for a given max
+rate is the filesize
+distortion is the quality
+lambda is a fixed value chosen as a tradeoff between quality and filesize
+Is this equivalent to finding the best quality for a given max
 filesize? The answer is yes. For each filesize limit there is some lambda
 factor for which minimizing above will get you the best quality (using your
 chosen quality measurement) at the desired (or lower) filesize.