Re: [Encode2mpeg-users] DVP642 A/V sync problem with ac3 5.1 audio

[JohnG <4p...@gm...>]

> I have seen that mencoder's avi muxer has more than one problem.
> You can try to use the libavformat muxer and see what kind of
> results you have. Add to your command line the option "-lavf".
>
> Keep in mind the following when using -lavf:
> - encode2mpeg 0.6.4 works ONLY with MPlayer1.0rc1
> - do not use bframes if you encode the video (add -bframes 0)
> - the option -noodml does not work (do not exceed 1GB file size)
>
> The avi made using -lavf should play without desync on the DVP 642.
>   
I have lost all interest in the DVP-642. I got nowhere with it despite 
two years passing. It is a sorry player. OTOH, I have had the Samsung 
ONE week today and I am re-transcoding and playing avi files already! I 
am having no problem with >1GB avi files.
> Check about the Samsung.
>   
A few minutes ago I posted a solution that I am using right now for 
files with ac3(3f+2r+lfe). The script was was used on a 4.4GB mkv file:

VIDEO: [avc1] 1280x544 24bpp 23.976 fps 0.0 kbps ( 0.0 kbyte/s)
AC3: 5.1 (3f+2r+lfe) 48000 Hz 448.0 kbit/s
The output avi file is 1.3GB:
VIDEO: [XVID] 720x480 12bpp 23.976 fps 1565.9 kbps (191.1 kbyte/s)
AC3: 5.1 (3f+2r+lfe) 48000 Hz 224.0 kbit/s

Note; the 224 rate is there because I had not yet added 320 to the 
script. It sounds fine, but I will re-encode it to 320 soon. I expect 
1.5GB file size.

My receiver autodetects the 5.1. In fact it automatically synthesizes 
surround-back so I end up with 6.1. Perhaps the audio is ES. I know the 
5.1 channels are correct because I tested with a 'home theater setup & 
calibration' CD.

> Let me know the results.
>
> Giacomo
>
>   
I have also used this script on a 6.6GB mkv file with dts:

#!/bin/bash
#transcodes DTS
#mencoder cannot copy ac3: copy does NOT work!!!!! Got it?
#mencoder borks the channel mapping, so the -af channel mapping!
#also, fix video to play on xvid capable DVD Player - Samsung 1080P7
#-af channels=6:6:0:0:1:2:2:3:3:5:4:1:5:4
# and for AAC -af channels=6:6:0:4:1:0:2:1:3:2:4:3:5:5
#2008-02-08 jwg 6 ch dts decoding is currently broken -channels 6 \
#MPlayer 2:1.0~rc1-0ubuntu9.2 (C) 2000-2006 MPlayer Team

FDATE=`date -I`
INFILE=$1
ENDPOS=$2
OUTFILE=$3
EXTRA=$4
PROFILE='dxnhtntsc'
#1.4GB = 1,400,000,000
VIDBITRATE=2000

echo "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
echo "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
echo $0 $INFILE $ENDPOS $OUTFILE $FDATE $VIDBITRATE $PROFILE

#
mencoder -vf expand=aspect=16/9,scale=720:480\
-endpos $ENDPOS:00\
-oac lavc -lavcopts threads=2:acodec=ac3:abitrate=320\
-ovc xvid\
-xvidencopts 
threads=2:autoaspect:noqpel:nogmc:bitrate=$VIDBITRATE:profile=$PROFILE\
-o $OUTFILE.avi\
$INFILE

echo "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
#mplayer -v -vo null -ao null -frames 0 *.avi

---------------------------------
Since DTS seems also to be borked, I let the DTS downsample to 2-channel 
and then out as ac3(2.0).

My receiver autodetects this as 2.0. This then plays as stereo plus 
subwoofer(2.1). If I select synthesize PL II Mov on the receiver, I get 
5.1. I have no idea, however, if the channels are correct.

Regards;
John