DVD Ripper DVDfab encoding error

[dave692]

I'm trying to use the DVD ripper that comes with DVDfab 8.1 to encode .mp4 video with single pass. I selected the first chapter, which is about 2 minutes long.

When the conversion starts and gets around 18%, I get the following error:

Work 1 failed, Error = 504.00 0 error: process exception, filter(type128:id11), info = 503.00 13

Does anyone have any idea what is causing this error?

Edit:

I always get the error message disregarding the type of video selected for conversion.

[dave692]

Update:

Its working after I changed the source audio to AC-3/5.1 for profile "generic.mp4.h24.aac". But I'm still confused. Wouldn't it be better if I choose PCM/2 if I'm going for stereo channel output?