No audio!?!?!

[Soop]

I am having problems getting a DVD -> MPEG. I'm using DVDextractor to make a VOB file and then ffmpegX to TRY and make it into a MPEG as made in an earlier post. Unfortunately, I am getting no sound.

Could someone help me out? Keep in mind, this is the 1st time I have ever done this = Newbie.

Thanks,
Soop

[tgpo]

First things first, make sure that under the Audio tab that Process Audio is checked.

[Soop]

If you mean the Encode Audio checkbox......yup, it sure is.

[galactica]

What are you selecting as your "open" source file?
If that doesnt have sound in it, ffmpegx wont beable to convert any sound

also, what is your terminal code that comes up when you do this encoding, any errors about audio?!?!

I sometimes get perfect encoding but a small error about audio, then all i get is .m2v which will only be video, not sound

are you getting .m2v as a product? or .mpeg?

also, what program are you watching the movie in to say there is no sound?

[Soop]

My source is a .vob file


This is what I get in my Terminal:

Encoding started on Thu Jul 10 15:01:12 EDT 2003
Input #0, mpeg, from '/Users/kristenf/Desktop/Promo Only June 2003 Hot Video/Track01_P001_S02.vob':
Stream #0.0: Video: mpegvideo, 720x480, 29.97 fps, 7800 kb/s
Stream #0.1: Audio: pcm_s16be, 48000 Hz, stereo, 1536 kb/s
Output #0, avi, to '2':
Stream #0.0: Video: mpeg1video, 720x480, 29.97 fps, q=2-31, 7800 kb/s
Stream #0.1: Audio: mp3, 48000 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Press [q] to stop encoding
frame=99624 q=0.0 size= 201319kB time=230.4 bitrate=7158.0kbits/s
bench: utime=53.930s
Encoding completed on Thu Jul 10 15:02:15 EDT 2003

No errors!

When the end file comes out it is a .mpg file but with no extention so I add .mpg to it.

It won't play in Quicktime (Which I need it to do) but it will play, without sound, in mplayer.

Thanks,
Soop

[galactica]

Encoding started on Thu Jul 10 15:01:12 EDT 2003
Input #0, mpeg, from '/Users/kristenf/Desktop/Promo Only June 2003 Hot Video/Track01_P001_S02.vob':
Stream #0.0: Video: mpegvideo, 720x480, 29.97 fps, 7800 kb/s
Stream #0.1: Audio: pcm_s16be, 48000 Hz, stereo, 1536 kb/s
Output #0, avi, to '2':
Stream #0.0: Video: mpeg1video, 720x480, 29.97 fps, q=2-31, 7800 kb/s
Stream #0.1: Audio: mp3, 48000 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Press [q] to stop encoding
frame=99624 q=0.0 size= 201319kB time=230.4 bitrate=7158.0kbits/s
bench: utime=53.930s
Encoding completed on Thu Jul 10 15:02:15 EDT 2003

No errors!

When the end file comes out it is a .mpg file but with no extention so I add .mpg to it.

It won't play in Quicktime (Which I need it to do) but it will play, without sound, in mplayer.

Thanks,
Soop

Well a couple of things
1. You have spaces in the name of the movie file. Why its accepting it and working I dont know. You are not to have any spaces in the file name nor the path name.
2. you are not doing any sort of video resolution drop with your encoding process, essentially all your doing is changing the audio from PCM to .mp3. Just making you aware of that. You just say DVD -> MPEG but you dont say for what purpose. Generally, people drop the video k/sec a bit because taht will help to decrease the file size of your final product.
3. The audio is PCM. Ive never worked aith PCM audio before, I dont see why ffmpegx should have a problem, but thats one interesting thing to note.
4. and there's something going on here beause
Encoding started on Thu Jul 10 15:01:12 EDT 2003
Encoding completed on Thu Jul 10 15:02:15 EDT 2003
Were talking only what, 1 min and some seconds

Unless you have a new G5 dual 2.0, or have some ungodly clocked mac your not really doing much.

What preset did you use? What VIDEO CODEC are you using?

5. Another thing to do would be to get MPEG INFO (http://www.versiontracker.com/dyn/moreinfo/macosx/12845) and drag the .mpg file ffmpegx makes onto teh MPEG INFO icon and paste the results into here.

[Soop]

What I am trying to do is rip & encode music videos to use with Megaseg. It is built on Quicktime, that is why I need the vids to play in QT.

I am a HUGE newbie on the video front so I really don't know what I'm doing, hence the not knowing that I wasn't compressing. Also, I have tried a few of the codecs and am not sure which setting I had it on.

Any info/suggestions you can give me to help is greatly appreciated.


Here is what I got from MPEG Info X:

Mpeg 1 System File [Video/Audio]
Muxrate : 1.13 Mbps
Est. Duration: 03:50.09s
Size [640 x 272] 23.98 fps 1.00Mbps
Audio : Mpeg 1 layer 3
128kbps 48000Hz
Joint Stereo : (Intensity stereo off, M/S stereo on)
No emphasis

Thanks,
Soop

[AntnyMD]

FYI, I've never had ffmpegX work with a vob file containing PCM audio. After a few struggles with it, I gave up on doing anything to discs that have PCM audio as the source.

Also, isn't MPEG-2 video (or even MPEG-1 video) with MP3 (!!) audio an odd combination? Quicktime does just fine with these kinds of videos as long as you've multiplexed an MPEG-1 Layer 2 audio file into the stream (i.e., an MP2/MPA audio file).

Trying to do weird things causes problems. Stick to what Quicktime likes.

[Soop]

Therein lies the rub, I don't know what Quicktime likes or how to go about making it. Please help, if you are able.

Thanks,
Soop

[galactica]

FYI, I've never had ffmpegX work with a vob file containing PCM audio. After a few struggles with it, I gave up on doing anything to discs that have PCM audio as the source.

Also, isn't MPEG-2 video (or even MPEG-1 video) with MP3 (!!) audio an odd combination? Quicktime does just fine with these kinds of videos as long as you've multiplexed an MPEG-1 Layer 2 audio file into the stream (i.e., an MP2/MPA audio file).

Trying to do weird things causes problems. Stick to what Quicktime likes.

Yea it is, usually its with .mp2.
The strange thing is it somehow made this file in less than 1 min! Im blown away.

I really think it has something to do with the PCM audio.

I would try extracting the audio and video files from the .vob using bbDemux (or any .vob extraction tool) and you will get .m2v and apparently a .pcm audio file

Ive never worked with .pcm so you will have to figure out how to get it converted to .mp2 (maybe someone knows how to do that?)

You can run the .m2v though ffmpegx and make it what you want it as far as k/sec and all.

If you dont have mpeg2 plaback and quicktime is the only way you are going to watch this file you can either
1. buy the quicktime mpeg2 playback component
2. convert it to mpeg1 (does quicktime play this back natively?)
3. or you can keep it as mpeg2 and just use Video Lan (a free video playback program for OSX thats probably the best playback program out there, other than say MplayerOSX) ( www.videolan.org)

hope this has been somewhat of a help.
Ill see what else i can find on PCM audio conversions, or perhaps someone else knows?

[AntnyMD]

Ive never worked with .pcm so you will have to figure out how to get it converted to .mp2 (maybe someone knows how to do that?)

Working with PCM audio from a DVD works successfully only when you've ripped the DVD using DVD Extractor (the OS 9 version), and used PCMtoAIFF from within OS 9 to convert the .pcm file to a .aiff file. If you rip the DVD is OS X first then work with the .pcm file in OS 9, it will squeak and squeal at best, or make a file whose sound is soooo high pitched you feel your ears will be damaged (no joke).

Once you've done the work in OS 9, you can take the component files back into OS X and work with them from there.

(*Note: Once Mac systems come online that lack the ability to use OS 9 at all, working with DVDs containing PCM audio will require VirtualPC and PC apps, unless Microsoft shutters VirtualPC development. Hopefully by then some of our friends in the open source community will have worked out a simple standalone app to work with PCM audio ripped from a DVD in OS X. The only app I've seen on OS X that works well with PCM audio DVDs is 42, but it seems only for DVD-to-DivX conversions.)