I decided to compare using the --reduce-hf switch of mpeg2enc to other methods for reducing noise and the bitrate, after having ignored it previously. I was pleasantly surprised. To take an example, I converted noisy DV footage to DVD format with -q 5 and -b 8500:
no denoising : 8300 kb/s (mostly hitting the upper bound) yuvdenoise : 7700 kb/s --reduce-hf : 7400 kb/s yuvdenoise + yuvmedianfilter: 6000 kb/s yuvdenoise + --reduce-hf : 4900 kb/s all of the above : 3600 kb/s Note that while --reduce-hf or yuvdenoise alone is only a modest improvement, together they reduce the bitrate substantially. But here's the thing - I can't see the difference between yuvdenoise alone and yuvdenoise with --reduce-hf. There's no free lunch, so can somebody please tell me what sorts of artifacts I need to look for? I know what yuvdenoise (temporal filtering) and yuvmedianfilter (spatial filtering) look like, but unless my eyesight is worse than I think, --reduce-hf is a lot more subtle. I was assuming that fine detail would suffer, but I don't really see that. But then again my camera doesn't really capture too much fine detail. Dan ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
