AVI to DVD- no audio

[manech]

Hi,
First of all I am an absolute beginner.
I want to convert an AVI file into aDVD file to be watched at my television.
First of all I had problems to get the image size right. I think I found this.
My settings: preset AVI to DVD mpeg2enc, video DVD 16:9, options decode with QT/letterbox.
When I click encode and do a preview, the image seem to be OK... but I don't have AUDIO.
Can someone tell me what to do to to solve this problem?
Thanks a lot for your help.

[major]

If you open the AVI file in Quicktime Player, do you hear the audio?

[manech]

No I can't hear it in Quicktime, though when I use the preview button in ffmpeg I can hear the audio.

[major]

Probably it has AC3 audio, which Quicktime is unable to decode, you should either disable the "Decode with Quicktime" option, either install third-party QT AC3 codecs which you should be able to find with Google.

[manech]

Thanks for the tip... I encoded my AVI , image is OK, audio is Ok, but audio and image are not synchronised... so now I have this problem. Is there a way to fix this problem?
Thanks

[Case]

If the sync gap is constant, you can set an offset in milliseconds with the mux tool.

[manech]

Being a debutant.... can you tell me what to do?
I go to tools, go to MUX.
Then must I click video, and select the encoded video_ts folder?
For audio1, must I select the audio_ts folder?
Then set the sync offset? Or am I completely wrong here.
Or maybe I have to set the sync , and then encode the movie? Or can I set the sync when the avi is already decoded? (maybe stupid questions... bust as I said I am a beginner...)

[Case]

The mux tool wants video (m2v/mpv) and audio (mp2/mpa/ac3) separated as input. ffmpegX generates these before building the VIDEO_TS folder. Maybe you haven't deleted these files yet?

[manech]

Thanks,I used the files you said to mux. When I click "mux" after a few minutes the progress window says "failed". When I click info it says:**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!.
Do I something wrong?

[Case]

When the program puts a video stream and audiostream together with an offset for one of them, then -near the end- one of the streams may 'run out' before the other. Under-runs, as in: not enough frames available to do what is asked; all out of ingredient #1 to mix with #2.
If the error is minor, then the Mux tool will continue and generate an .mpg file and VIDEO_TS folder. Do these playback okay?

[manech]

What do you mean with "do these playback OK?". I see there is a new file .mpg, but the video_ts folder hasn't changed.

[Case]

What do you mean with "do these playback OK?". I see there is a new file .mpg, but the video_ts folder hasn't changed.

The files in the VIDEO_TS folder may have been overwritten, as generating that folder for the second time used the same file/folder names. It looks the same, but may be altered.
Open the new .mpg file in QuickTime/VLC/MPlayer, is it synced to your specification?
Open the new VIDEO_TS folder with Apple DVD Player, likewise, is it synced to your specification?

[manech]

The .mpg file won't open in quicktime. In VLC it opens, but no sound or subtiteling. Video_ts folder with apple DVD player is unchanged.

[Case]

The .mpg file won't open in quicktime.

If you do not have the QuickTime MPEG-2 playback component installed, then this is normal behaviour. A default QuickTime install without that component won't open/play MPEG-2 content.

In VLC it opens, but no sound or subtiteling.

Then the muxing didn't go right. Bummer. I suppose the VLC file info (Command-I) will show only one stream (the video) then.

Video_ts folder with apple DVD player is unchanged.

Then the error wasn't minor, and the .mpg file wasn't good enough to build a VIDEO_TS folder from it.

I had good hope this would work, too bad. If you haven't given up yet, there is still the other 'route' you could try:
• Install the AC3 component and encode from the AVI again with Decode with QT selected. QuickTime decoding seems to handle the sync better in some cases.

[manech]

No No I haven't given it up yet... I am sure with the help of a specialist like you, I will be able to disolve my problems... as a matter of facts I learned already a lot
I downloaded the AC3 codec component. Does it install itself? or do I have to put it somewhere?
It is now on my desktop

[Case]

do I have to put it somewhere?

/Library/QuickTime/

[manech]

Ok thanks. I do the test now... It will take a few hours to decode. Is there no possibility to have a preview with sound and image while encoding the movie?
Becaus e when I click the preview button , I can se that my image is ok, but I have no audio... or will it change now with the new ac3codec installed?

[Case]

You can save testing time by splitting up your AVI, and working with the small segment.

[DeusExMachina]

If it is only a playback error, you can use MPEG Streamclip (http://www.squared5.com/) to fix the sync. If the sync is actually saved incorrectly in the file, you can shift it earlier or later with a number of utilities, including QT Sync. (http://www.qtsync.com)

[manech]

Thanks a lot, everything works fine now, just synchronising my subtitling and everything is OK.
Thanks very much for your professional help.