On Fri, Nov 08, 2002 at 11:41:36AM +0000, Dominik Szczerba wrote:
[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
Are you sure yours dvds are ntsc 29.97?
well, that's what mplayer says.
I remember I had this problem when I begun with mencoder. If I played the vob with mplayer, it said 29.97 fps. When I passed this value to mencoder I got a file shorter than I calculate... Some day I proved the vob with transcode (a fine piece of software, but has serious problems with A/V sync with ntsc dvd) and it said fps: 23.976 which seems the standar for no television movies. I tried with ofps=23.976 and the expected size and the final size of the files became very closed.
how close? not with 25/23.976 by some chance? ;) Can you still check it, do you still have the files?
ds
Hi Dominik !!!!! I haven't the old files, but I made some test for you with a newer. In http://mate.dm.uba.ar/~mpavon/tmp You can find the following files: sample.vob (20mb) test.sh 23.976.log 29.97.log The first is the vob sample for the test. I encoded it with a target size of 2mb. I estimated the videobitrate with the formula target_size*1024^2*8/(duration_in_sec*1000) Duration is 26.7 sec so I got 628 approx. For the test I used test.sh first with OFPS="-ofps 23.976" and output ofps-23.976.avi and later without it (so I believe mencoder used 29.97 as it said) with output ofps-29.97.avi. The size of the resulting files is: -rw-r--r-- 1 m users 2104052 Nov 8 23:19 ofps-23.976.avi -rw-r--r-- 1 m users 1663710 Nov 8 23:21 ofps-29.97.avi As you can apreciate, 23.976 reach the target size and 29.97 is noticiablely smaller. 23.976.log and 29.97.log are a cut & paste from the Eterm after the second pass. You can see the the difference in the duplicate frames between 23.97 and 29.97, I guess this is a sign the that 29.97 fps is wrong Regards, Martín -- Martín Pavón martin_199ar@yahoo.com.ar http://mate.dm.uba.ar/~mpavon/