No Audio after conversion

[gcam]

I am using TMPGEnc 3.0 Express to resize some video from 352x480 to 704x480, but after encoding I get no audio. I have tried twice and cant figure out why the audio is dead, I mean the conversion looks as though it was done but when I try to playback the audio there's not sound at all. Is there something I else I can try for resizing?

Thanks

[redwudz]

What format was the audio before conversion? AC3? Try dropping the converted file into Gspot and see if there really is audio. Do the same with the original file.

I suspect either the audio didn't get converted or it was converted to a format that your player didn't play back. Try VLC Media Player to see if it works with the converted file.

If the audio is already in the proper format, don't convert it, just the video. Then add (mux) the original audio back with the converted video.

[gcam]

Well to be honest I'll do a step by step of what I did.

1. pull dvd vobs from original dvd with DVDshrink, re-author a segment, about 600mb or 28 min worth.
2. Use PGCDMux to extract video/audio and check audio sync delay
3. Use AC3Gain to increase volume
4. Use delaycut to fix audio sync delay

From this point I can now author a short dvd of project, so I author dvd.

The problem started when the video extracted was at 352x480 and not 704x480 as was with other segments from different dvds. All original dvds were processed this way, so still unsure as to why I get 3 segments at different values.

Anyways, from here I would open MPG video wizard dvd and edit, but I found that with the encoding that completed I would end up with no audio. So I tried something different.

I open TMPGEnc, pull the video out, then try to go thru a re-encode to resize the video to 704x480, but afterwards it doesnt work, no audio.

I am going to try and resize the video only thru TMPGEnc and use the existing ac3 audio that I got from PGCDMux and use MPEG video wizard to re-encode the video. see what that does.

Tried Gspot but didnt see anything wrong, the audio was there but wouldnt play.

[RickA]

-edit-

Sorry, missread what you had said and unsure how to completely delete my post.

Cheers,
R

[redwudz]

I'm not that familiar with TMPGEnc Express. I see it lists 'Dolby Digital' for acceptable input and I assume that means AC3, but maybe not. It doesn't list AC3 or Dolby Digital for audio output, though. With the older TMPGEnc encoder, I just encoded the video and either converted the existing audio to AC3 with ffmpegGUI or demuxed the original AC3 and added it back when authoring.

If you have DVD spec. AC3 audio, no reason to run it though a video encoder anyway. And AC3 won't work on many players unless you have a AC3 codec installed. That's why I suggested VLC as a test, as the codecs are built in.

Of course, this is all just a guess.

[gcam]

I'm not that familiar with TMPGEnc Express. I see it lists 'Dolby Digital' for acceptable input and I assume that means AC3, but maybe not. It doesn't list AC3 or Dolby Digital for audio output, though. With the older TMPGEnc encoder, I just encoded the video and either converted the existing audio to AC3 with ffmpegGUI or demuxed the original AC3 and added it back when authoring.

If you have DVD spec. AC3 audio, no reason to run it though a video encoder anyway. And AC3 won't work on many players unless you have a AC3 codec installed. That's why I suggested VLC as a test, as the codecs are built in.

Of course, this is all just a guess.

yeah thats true, I did run it thru VLC and everything else that I could but still didnt get any audio sounds. So what I did last night is encode the video size by itself without audio, then went into MPEG Video Wizard and threw down the audio (AC3) and it looks fine.

Now the other thing that is bothering me is that the bit rate on the other video files that I have are at variable 9600, where as the video I just resized is at 4000 constant. What I dont want to do is have this re-encoded file increase in size (mb), as it did before throwing it over the 1gb range (original is 600mb). I did try that before but when I authored the videos I had too much file size and had to shrink the dvd, and the end result looked ugly.

Gonna see what this 4000 bit rate looks like compared to the others and hope that there's not much difference, though it looks like there will be.

[gcam]

Well, thought everything worked out fine, I got the video re-sized, then I laid everything out in MPEG Video Wizard, and re-encoded, then plopped it in dvd lab pro and after demuxing saw that the audio lost 8+ mins, not sure how that happened, the audio and video files in MPEG VW are fine, I rechecked. Video is 2:33:59 and audio is 2:24:31.

I opened the vob files in PGCDM and there is no audio delay, so not sure about what happened.