mencoder options NTSC 29.97 -> PAL 25 fps with a/v sync

[menket]

Hello,

I'm use mencoder to produce MPEG2-file for DVD Lab Pro. Input file is NTSC with 29,97 fps video track, MP3 cbr 128 kb/s audio track.

Data from MediaInfo:

General
Complete name                    : INPUT.avi
Format                           : AVI
Format/Info                      : Audio Video Interleave
File size                        : 700 MiB
Duration                         : 1h 29mn
Overall bit rate                 : 1 098 Kbps
Writing application              : VirtualDubMod 1.5.4.1 (build 2178/release)
Writing library                  : VirtualDubMod build 2178/release

Video
Format                           : MPEG-4 Visual
Format profile                   : Streaming Video@L1
Format settings, BVOP            : Yes
Format settings, QPel            : No
Format settings, GMC             : No warppoints
Format settings, Matrix          : Custom
Codec ID                         : XVID
Codec ID/Hint                    : XviD
Duration                         : 1h 29mn
Bit rate                         : 961 Kbps
Width                            : 512 pixels
Height                           : 384 pixels
Display aspect ratio             : 4/3
Frame rate                       : 29.970 fps
Resolution                       : 24 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.163
Stream size                      : 613 MiB (88%)
Writing library                  : XviD 1.2.0.dev47 (UTC 2006-11-01)

Audio
Format                           : MPEG Audio
Format version                   : Version 1
Format profile                   : Layer 3
Codec ID                         : 55
Codec ID/Hint                    : MP3
Duration                         : 1h 29mn
Bit rate mode                    : Constant
Bit rate                         : 128 Kbps
Minimum bit rate                 : 128 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Resolution                       : 16 bits
Stream size                      : 81.6 MiB (12%)
Alignment                        : Aligned on interleaves
Interleave, duration             : 67 ms (2.00 video frames)
Interleave, preload duration     : 504 ms
Writing library                  : LAME3.97 
Encoding settings                : CBR

I want convert this file for create DVD PAL. Ok.

Use command line:

mencoder.exe -of mpeg -ofps 25 -fps 30000/1001 -mpegopts format=dvd:film2pal:tsaf -srate 48000 -ovc lavc -oac lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=15:vrc_maxrate=9800:aspect=4/3:vbitrate=5000:vstrict=0:acodec=ac3:abitrate=128 -mc 0 -noskip -vf scale=720:544,expand=720:576,harddup -ssf ls=100 -o OUTPUT.mpeg INPUT.avi

After this, a/v sync is bad... I see it GOM Player (select .IFO file).

Question: how to convert my video file to MPEG2 format without desync a/v? Use only mencoder, if possible.

P.S. I read other topics about NTSC->PAL conversion, about sync a/v, but I have use only mencoder.

Thanks.

[45tripp]

Use command line:

mencoder.exe -of mpeg -ofps 25 -fps 30000/1001 -mpegopts format=dvd:film2pal:tsaf -srate 48000 -ovc lavc -oac lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=15:vrc_maxrate=9800:
aspect=4/3:vbitrate=5000:vstrict=0:acodec=ac3:abitrate=128 -mc 0 -noskip -vf scale=720:544,expand=720:576,harddup -ssf ls=100 -o OUTPUT.mpeg INPUT.avi

and the output of that command??..

P.S. I read other topics about NTSC->PAL conversion, about sync a/v, but I have use only mencoder.

but why you have use only mencoder?

other routes provide more flexibility.

After this, a/v sync is bad...

indeed.
first.
it's 29.97 progressive? what was the original source? why aren't you working with that?

then,
film2pal is the wrong filter to place in your process.
kill it.

and then major offender.
kill -noskip.
skipping frames is essential to your process.

mencoder -of mpeg -mpegopts format=dvd:tsaf -ofps 25 -srate 48000 -ovc lavc -oac lavc -lavcopts vcodec=mpeg2video:vrc_buf_size=1835:keyint=15:vrc_maxrate=9800:
aspect=4/3:vbitrate=5000:vstrict=0:acodec=ac3:
abitrate=128 -vf scale=720:544,expand=720:576,harddup -ssf ls=100 -o OUTPUT.mpeg INPUT.avi

tripp

[menket]

but why you have use only mencoder?

mencoder is fast. Other tools converts movies 2-3 times long, than mencoder.

it's 29.97 progressive?

I don't know. How to know?

kill -noskip

Great! Work! Thanks

And one small question. If input fps is 23,97, opt -noskip must be removed?

[45tripp]

I don't know. How to know?

manually go through it frame by frame, to check.

And one small question. If input fps is 23,97, opt -noskip must be removed?

if it's 23.976 then use film2pal.
leaving -noskip in should do no harm.


tripp