For atleast x264 the first pass may contain the bitrate to make a more accurate guestimation of the compression quantitizer.
I can't imagine that it will decrease quality, most likely it will improve it (time to do some extensive testing myself)
Search found 3 matches
- Sat Aug 19, 2006 12:15 am
- Forum: Development
- Topic: 3pass encoding in x264 broken
- Replies: 6
- Views: 9152
- Fri Aug 18, 2006 4:59 am
- Forum: Development
- Topic: 3pass encoding in x264 broken
- Replies: 6
- Views: 9152
A simple (untested) patch for this bug: http://onsnetis.boldlygoingnowhere.org/videoencoders.cpp.patch.txt --- videoencoders.cpp.old 2006-08-03 21:06:48.000000000 +0200 +++ videoencoders.cpp 2006-08-17 20:51:36.758768945 +0200 @@ -389,16 +389,16 @@ break; case 2: // 2-pass cmds[0] = mecmd; - cmds[0]...
- Fri Aug 18, 2006 1:45 am
- Forum: Development
- Topic: 3pass encoding in x264 broken
- Replies: 6
- Views: 9152
3pass encoding in x264 broken
Seen in 0.50 and in the 0.51 build 2390 under video options: 1st pass: .... :pass=1:turbo=2 -nosound -o NUL 2nd pass: ....:pass=2:turbo=2:bitrate=$(VideoBitrate) -nosound -o NUL 3rd pass: ....:pass=3:bitrate=$(VideoBitrate) -nosound -o "$(DestFile)" So there are 3 errors (IMHO): 1- bitrate missing i...