[Dvdauthor-users] problem with multiplexed sound (Discontinuity in audio channel)

[gregory d. <gr...@ic...>]

Hi all,

i've created an multiplexed mpg the following way :

# here i create the m2v with video bitrate set to 9000 and audio to 128 (i
also tried with 224 see below) from a group of 768x576 jpeg files
(\
ls imgs/*.jpg | xargs -n1 djpeg \
| ppmtoy4m -v 0 -F 25:1 -S 420_mpeg2 -I t -L\
)  \
| yuvscaler -v 0 -O SIZE_720x576 \
| mpeg2enc -v 0 -V 300 -b 9000 -B 128 -f 8 -a 3 -F 3 -I 1 -o dvd.m2v

# now i create a .mp2 (i also tried .m2a) silence which has the same
duration as my .m2v (1332480 = 1920 * 694 frames)
dd if=/dev/zero bs=4 count=1332480 | lame --silent -b 128 -s 48 /dev/stdin
silent.mp2

# now i multiplex both video and audio
mplex -r 9800 -f 8 silent.mp2 dvd.m2v -o dvd.mpg

# everything works fine up to now...

# now the authoring
dvdauthor -o DVD -x dvd.xml

my xml file looks like this (could hardly be more simple):
<dvdauthor>
    <vmgm />
    <titleset>
        <titles>
            <pgc>
                <vob
file="/Library/WebServer/Documents/nas/media_ssr/export/2/26/dvd.mpg" />
                <post>
                    jump chapter 1;
                </post>
            </pgc>
        </titles>
    </titleset>
</dvdauthor>


and that's what dvdauthor says :

DVDAuthor::dvdauthor, version 0.6.10.
Build options: gnugetopt iconv freetype
Send bugs to <dvd...@li...>

INFO: Locale=C
INFO: Converting filenames to US-ASCII
INFO: dvdauthor creating VTS
STAT: Picking VTS 02

STAT: Processing
/Library/WebServer/Documents/nas/media_ssr/export/2/26/dvd.mpg...
WARN: Discontinuity in audio channel 8; please remultiplex input.
WARN: Previous sector: 0.144 - 0.144
WARN: Current sector: 0.288 - 0.288
WARN: Discontinuity in audio channel 8; please remultiplex input.
WARN: Previous sector: 0.288 - 0.288
WARN: Current sector: 0.408 - 0.408

...

WARN: Discontinuity in audio channel 8; please remultiplex input.
WARN: Previous sector: 27.672 - 27.672
WARN: Current sector: 27.816 - 27.816
WARN: Discontinuity in audio channel 8; please remultiplex input.
WARN: Previous sector: 27.816 - 27.816
WARN: Current sector: 27.936 - 27.936

INFO: Video pts = 0.184 .. 26.224
INFO: Audio[8] pts = 0.144 .. 27.936
STAT: VOBU 45 at 6MB, 1 PGCS
INFO: Generating VTS with the following video attributes:
INFO: MPEG version: mpeg2
INFO: TV standard: pal
INFO: Aspect ratio: 16:9
INFO: Resolution: 720x576
INFO: Audio ch 0 format: mp2/2ch, 48khz 20bps

STAT: fixed 45 VOBUS
INFO: dvdauthor creating table of contents
INFO: Scanning DVD/VIDEO_TS/VTS_01_0.IFO



As a result, i have good VIDEO_TS folder but my AUDIO_TS is empty.

I've tried to use the following audio bitrates (feeding them from the
command line to mpeg2enc and lame) with no luck :
128, 224

mplex reads the audio bitrate well.
i'm using mjpegtools 1.6.1-22 (from fink)


What can i do now? Please help.