Log in

View Full Version : No audio after conversion


Blinkr
26th June 2003, 22:14
I used SmartRipper to rip a single chapter from a movie. Then I used DVD2AVI to convert it to an avi file. When I opened it in my editor the video was there but no audio. Where did I loose the audio? Can someone advise me of what the settings for each program so I can make sure the audio converts with the video??

Thanks!!

Hiro2k
27th June 2003, 00:46
I don't think the audio was passed on in SmartRipper. Also why are you using DVD2AVI to create your AVI? It's a lot better imo to create the avi file with Gknot.

Blinkr
27th June 2003, 03:14
Thanks Hiro2k! But I installed that & am still a little confused as to how to do it. Can you point me to a link that will give me some instruction in using GKnot. You are talking about Gordian Knot aren't you? If so, I downloaded & installed Gordian Knot Rip Pack. Was this what you are referring to?

Thanks again!!

Hiro2k
27th June 2003, 04:13
Yes that's what i was talking about. Now as for a link, check out Doom9's guide on the front page.

Blinkr
2nd July 2003, 02:54
Hiro2k,
Thanks for the recommendation. I have found the guide for Gknot & followed it. But still can't get an .avi file. Everything that I have done so far has ended up with no audio either.

The guide mentioned Besweet to handle the audio but I don't see any tabs for it or does it work automatically from within Gknot. I look for the file for audio & all I find are .ac3 files that are from 4k to maybe 8k & that's all. Is the DVD Decrypter not extracting the audio??

You also asked why I was using DVD2AVI, that Gknot was alot easier but Gknot has a DVD2AVI button on the first screen & you are suppose to use DVD2AVI after DVD Decrypter according to the guide.

Any other suggestions for help!! If you have time & don't mind, would you be able to give me a step by step of how you rip a DVD to an .avi file (or a MPEG2).

Thanks!!

Hiro2k
2nd July 2003, 07:23
Well the guides are pretty much what you have to do. But DVD2AVI is what makes your AC3 files. You need to go into the audio tab and tell it to demux all dolby digital tracks. Then you can use the completed AC3 files.(should be more than ~200MB) Then with the video you need to check to see if it's FILM greater than 95%, by runing a short preview, F5. IF it's above 95%, you need to select FORCE film in the video menu. If it's under 95%$, just make sure Force Film is turned off. Also you need to save the project(shortcut key F4). Do not save as AVI, I think that's where you might be messing up. After it's done, check to see if your AC3 file is there, and that you can load the project into Gknot. I hope that's what your doing so far.
I think it would be kinda redundant to write up what I do make an AVI as it's all in the Guide. Good Luck.

Blinkr
2nd July 2003, 16:26
Originally posted by Hiro2k
Well the guides are pretty much what you have to do. But DVD2AVI is what makes your AC3 files. You need to go into the audio tab and tell it to demux all dolby digital tracks. Then you can use the completed AC3 files.(should be more than ~200MB) Then with the video you need to check to see if it's FILM greater than 95%, by runing a short preview, F5. IF it's above 95%, you need to select FORCE film in the video menu. If it's under 95%$, just make sure Force Film is turned off. Also you need to save the project(shortcut key F4). Do not save as AVI, I think that's where you might be messing up. After it's done, check to see if your AC3 file is there, and that you can load the project into Gknot. I hope that's what your doing so far.
I think it would be kinda redundant to write up what I do make an AVI as it's all in the Guide. Good Luck.

All of this is clear of course but there are a couple of questions on this process. I usually end up with more than one AC3 file. Some of them refer to whether it is 2, 4 or 6 channel stereo. I am not too clear as to which one to use. When I am using DVD Decrypter it has a setting to choose which stream to use. Obviously I uncheck the foreign languages, but usually leave the rest (except the subtitles, I uncheck them too). Also there is an option to Include in the Include in VOB, Demux to new file, or Raw (I think that is correct as I am not at the PC that I do this on now). I usually use the first choice, but have tried the Demux also. If you use the Include in VOB option, will there still be audio after running it thru DVD2AVI?

When running DVD2AVI & previewing for the info you talked about above, it doesn't always say FILM. Sometimes the only way I could get it to say FILM was to use the Force Film option before running the preview. This also gave the correct settings for the bitrate when loading the D2V file into Gknot. I have a couple of guestions about Gnot's settings but since I am not at that PC right now I will have to post them when I am.

I hope I am not imposing on you too much!! But you have been helping me more than most of the searches I have done or the questions I have posted to the messageboard so far. Please forgive me for throwing out some dumb questions. But even though the Gknot guide is thorough I am not always getting the results or finding the settings that it refers to when working with it. So I have to find some way to clear things up!! Thanks so much for your help!! Please let me know if I am a pest!!

Hiro2k
2nd July 2003, 18:28
Originally posted by Blinkr

When running DVD2AVI & previewing for the info you talked about above, it doesn't always say FILM. Sometimes the only way I could get it to say FILM was to use the Force Film option before running the preview.

That's incorect. You you need to run all previews with the ForceFilm unchecked. If it's 95% or above, then you can check ForceFilm. If it's under that % then you need to leave it unchecked. Once you have it unchecked, then you need to do an Inverse Telecine on it to get it to 23.97 fps again.

When you demux the audio, it depends on if you want the 6 Channel audio, or the 2 channel audio. If you don't have a souround sound system, then you should just use the 2 channel version.

Blinkr
6th July 2003, 19:56
Originally posted by Hiro2k
That's incorect. You you need to run all previews with the ForceFilm unchecked. If it's 95% or above, then you can check ForceFilm. If it's under that % then you need to leave it unchecked. Once you have it unchecked, then you need to do an Inverse Telecine on it to get it to 23.97 fps again.

When you demux the audio, it depends on if you want the 6 Channel audio, or the 2 channel audio. If you don't have a souround sound system, then you should just use the 2 channel version.

I had to get to the system that I run this on. When I run the previews I don't get "Film". I get "NTSC" instead. Can you tell me why this is & what I should or shouldn't do? Have I got a setting wrong so that "NTSC" shows instead of "Film"??

Thanks again!!

Hiro2k
6th July 2003, 21:55
That's completely normal. This only means you have to do a manual IVTC. Here read this, it might help clear up some of your questions.

http://www.doom9.org/ivtc-tut.htm


When it says FILM, that means the source was properly telecined and you can undo it with DVD2AVI's ForceFilm method. It reads the flags in the VOB that tells it which frames are duplicates and then DVD2AVI throws them out to get you a 24 fps. But if it says NTSC, it means either that DVD2AVI didn't recognize the flag patern, or that it was done wrong. But that doens't mean you can't IVTC it. So you have to use decomb or any other IVTC filter to do an IVTC, which will slow down your encoding compared to ForceFilm. There is no way to make your movie say FILM if it's NTSC.


I think i got that right.