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kavika

No Audio

Question

Using TOAST, I cannot figure out why audio plays on video clips with Edit button on the My DVD project set-up. But once burned, or even prior to that - using Save as Disc Image, the finished product/mounted icon will not play audio.

 

On the working project set-up, the info is:

 

DVD-Video: My DVD.disc

Video: DV/DVCPRO - NTSC, 720 x 480, 29.97 fps

Audio: 16-bit, Stereo, 4800 Hz

 

 

Working with: MAC PowerBook G4, Leopard OS X.10.5.7, using TOAST 8 Titanium, + Perian 1.1.3 installed already. Is this version TOAST not compatible with Leopard? Should I upgrade to TOAST 8.0.5 to resolve this problem? Would that it should be so simple.

 

Thx very much for any advice. I am stumped!

 

 

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There shouldn't be any problem with this, especially with a DV video source. You don't mention which version of Toast 8 you are using but if it is an early one then certainly install the updated version. I also suggest trashing the Toast plist and prefs files in your User>Library>Preferences folder.

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There shouldn't be any problem with this, especially with a DV video source. You don't mention which version of Toast 8 you are using but if it is an early one then certainly install the updated version. I also suggest trashing the Toast plist and prefs files in your User>Library>Preferences folder.

 

 

 

 

Thx very much, Tsantee. The earlier version of TOAST was 8.0. Updated to 8.0.5 as advised, & trashed previous TOAST plist + prefs files. Repeated process in updated TOAST, then Save as Disc Image, but after the final Mount Disc Image, it opened with DVD Player, but played with still NO audio.

 

What should I do now? Hope there are more alternatives. Thx in advance.

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Thx very much, Tsantee. The earlier version of TOAST was 8.0. Updated to 8.0.5 as advised, & trashed previous TOAST plist + prefs files. Repeated process in updated TOAST, then Save as Disc Image, but after the final Mount Disc Image, it opened with DVD Player, but played with still NO audio.

 

What should I do now? Hope there are more alternatives. Thx in advance.

This is very odd. In your Roxio Converted Items folder there should be both an .m2v and a .ac3 file when Toast encodes the video. Is the file size of the .ac3 file greater than zero? If so, there is audio there.

 

Something to test: Choose DVD with the top button of the Toast Media Browser and mount the disc image file that Toast created. You should see it in the browser list. You can access the titles and chapter levels using one of the buttons at the top of the browser. Select a title or chapter and drag it to the Toast Video window. Toast extracts the MPEG file from the mounted disc image. Does Toast describe it as having any audio? Try exporting the extracted video to another format and see if it plays with audio.

 

There isn't anything about Toast 8 with OS 10.5.7 that should cause this problem. I'm very puzzled.

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This is very odd. In your Roxio Converted Items folder there should be both an .m2v and a .ac3 file when Toast encodes the video. Is the file size of the .ac3 file greater than zero? If so, there is audio there.

 

Something to test: Choose DVD with the top button of the Toast Media Browser and mount the disc image file that Toast created. You should see it in the browser list. You can access the titles and chapter levels using one of the buttons at the top of the browser. Select a title or chapter and drag it to the Toast Video window. Toast extracts the MPEG file from the mounted disc image. Does Toast describe it as having any audio? Try exporting the extracted video to another format and see if it plays with audio.

 

There isn't anything about Toast 8 with OS 10.5.7 that should cause this problem. I'm very puzzled.

 

Thx, tsantee.

 

Discovered in Roxio Converted Items Folder:

 

m1a file - 224kBit.44kHzz.P1.0-17216.BFA7. Kind: MPEG Audio file. 15.3 MB on disk.

m2v file - 480x480.25Mb.4x3.M0.H0.T0.P0.0-17216.BFA7.m2v Kind: MPEG Elementary Stream 168.5 MB on disk.

 

 

In previous attempt, discovered both .mv2 & .ac3 files:

 

.ac3 file - .192kBit.48kHz.BFA7.ac3 Kind: Plain text 13.1 MB on disk.

.m2v file - NTSC.720x480.80Mb.4x3.M10.H0.T0.P0.BFA7.m2v Kind: MPEG Elemntary Stream 524.2 MB on disk

 

Could this "plain text" be the problem in the .ac3 file? Not encoded into an audio file?

 

Could not get anything open with QuickTime, which didn't recognize them as movie file. When dragged to TOAST Video window, only the .m2v file appeared as a video, but nothing listed with audio:

 

Video: MPEG-2, 480 x 480, 29.7 fps

Audio:

 

Attempts to play the file w/ both .ac3 & .m2v resulted in NO audio.

 

So.... Started over in TOAST, with new project, after dumping Preference files. Results:

 

Roxio Converted Items file now contains:

 

.ac3 - 192kBit.48KHz.0-17216.BFA7.ac3 Kind: Plain text Size: 13.1 MB on disk

.m2v - NTSC.720x480.80Mb.4x3.M6.H0.Y0.P0.0-17216.BFA7.m2v Kind: MPEG Elementary Stream Size: 491.5 MB on disk

 

Suspect that that Plain text .ac3 file might be a clue, right? Saved as Disc Image, then mounted Disc Image. Once again it played in DVD player with NO audio.

The original .mov files do play both video & audio in QuickTime. May be another process to burn these files to DVD.

 

Sorry for this lengthy message. Thx again for your advice.

 

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Thx, tsantee.

 

Discovered in Roxio Converted Items Folder:

 

m1a file - 224kBit.44kHzz.P1.0-17216.BFA7. Kind: MPEG Audio file. 15.3 MB on disk.

m2v file - 480x480.25Mb.4x3.M0.H0.T0.P0.0-17216.BFA7.m2v Kind: MPEG Elementary Stream 168.5 MB on disk.

These came from the encoding needed to create a SVCD which is burned to CD media rather than DVD media. Maybe you were trying other formats. I'll just ignore this for now.

 

In previous attempt, discovered both .mv2 & .ac3 files:

 

.ac3 file - .192kBit.48kHz.BFA7.ac3 Kind: Plain text 13.1 MB on disk.

.m2v file - NTSC.720x480.80Mb.4x3.M10.H0.T0.P0.BFA7.m2v Kind: MPEG Elemntary Stream 524.2 MB on disk

 

Could this "plain text" be the problem in the .ac3 file? Not encoded into an audio file?

Yes this seems to be a problem. On my Mac the .ac3 file is shown as a Digital Audio file as the Kind, not plain text.

 

Could not get anything open with QuickTime, which didn't recognize them as movie file. When dragged to TOAST Video window, only the .m2v file appeared as a video, but nothing listed with audio:

 

Video: MPEG-2, 480 x 480, 29.7 fps

Audio:

 

Attempts to play the file w/ both .ac3 & .m2v resulted in NO audio.

That's normal. The files in the Roxio Converted Items folder are there for Toast to multiplex to a joined audio and video MPEG file as part of its process. They aren't very usable on their own.

 

So.... Started over in TOAST, with new project, after dumping Preference files. Results:

 

Roxio Converted Items file now contains:

 

.ac3 - 192kBit.48KHz.0-17216.BFA7.ac3 Kind: Plain text Size: 13.1 MB on disk

.m2v - NTSC.720x480.80Mb.4x3.M6.H0.Y0.P0.0-17216.BFA7.m2v Kind: MPEG Elementary Stream Size: 491.5 MB on disk

 

Suspect that that Plain text .ac3 file might be a clue, right? Saved as Disc Image, then mounted Disc Image. Once again it played in DVD player with NO audio.

The original .mov files do play both video & audio in QuickTime. May be another process to burn these files to DVD.

 

Sorry for this lengthy message. Thx again for your advice.

It appears that for some reason your Mac is not correctly recognizing the .ac3 file as a digital audio file. Apparently that keeps Toast from finding it when it needs to multiplex the video and audio back together for the video DVD or disc image. I suggest running Disk Warrior if you have it or at least using the repair function in Disk Utility to see if this corrects the problem on your Mac. My diagnosis is your Mac has an OS problem that is showing itself in this way, rather than this being a Toast problem.

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It appears that for some reason your Mac is not correctly recognizing the .ac3 file as a digital audio file. Apparently that keeps Toast from finding it when it needs to multiplex the video and audio back together for the video DVD or disc image. I suggest running Disk Warrior if you have it or at least using the repair function in Disk Utility to see if this corrects the problem on your Mac. My diagnosis is your Mac has an OS problem that is showing itself in this way, rather than this being a Toast problem.

 

Appreciate your very informative advice. This is proving to be quite a learning experience for me. My knowledge of all this is limited, & the learning curve seems to grow. But I'm giving it a shot.

 

Used Disk Warrior & Disk Utility as advised, to repair & clean up whatever damage there might be on my Mac. But still no luck, nor any problems located w/ either tool. However, your comments re: the unrecognized .ac3 file pointed me in the direction to find Handbrake, a video transcoder, & MPEG Streamclip, a video converter.

 

In TOAST video window, after conversion w/ MPEG Streamclip, it read:

 

Video: DV/DVCPRO-NTSC, 720x480, 29.97fps

Audio: 16-bit, Stereo, 4800Hz

 

Saving as Disc Image resulted with a Roxio Converted Items file that contained:

 

224kBit.44kHz.P0.0-17350.D230.m1a Kind: MPEG Audio Size: 15.5 MB

NTSC.352x240.11Mb.4x3.M0.H0.T1.P1.0.17350.D230.m1v Kind: MPEG-1 Video Size: 79.5 MB

 

 

As you can see, there were no .ac3 nor .m2v files. In this case, the audio Kind was not plain text. However, the end result would still NOT play audio with either DVD Player or QuickTime. Both stated the media type was not supported.

 

Tried exporting MPEG Streamclip to QuickTime, DV, AVi, but all resulted with: audio media error.

 

Also tried saving MPEG Streamclip conversion of Final Cut Express file to .mov file, then repeated the TOAST process. But once again, NO audio in playback. Tried again, after trashing Prefs a 2nd time. This produced an audio disc image that played only white static noise. Go figure....

 

Handbrake's info indicates that much experimenting might result in success. It's very time consuming, but may be worth a try?

 

Further research online has also led me to conclude the following might possibly be the problem:

 

http://www.macintouch.com/readerreports/he.../topic3980.html

 

Apple has disabled the audio playback ability.

 

 

http://store.apple.com/us/product/D2187Z/A...NDAzOA#overview

Can the QuickTime MPEG-2 Playback Component play back AC3 audio?

No, MPEG-2 files containing AC3 audio cannot be played back with the QuickTime MPEG-2 Playback Component.

 

 

And so it goes. What do you think? Thx again for your assistance.

Edited by kavika

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In TOAST video window, after conversion w/ MPEG Streamclip, it read:

 

Video: DV/DVCPRO-NTSC, 720x480, 29.97fps

Audio: 16-bit, Stereo, 4800Hz

 

Saving as Disc Image resulted with a Roxio Converted Items file that contained:

 

224kBit.44kHz.P0.0-17350.D230.m1a Kind: MPEG Audio Size: 15.5 MB

NTSC.352x240.11Mb.4x3.M0.H0.T1.P1.0.17350.D230.m1v Kind: MPEG-1 Video Size: 79.5 MB

 

And so it goes. What do you think? Thx again for your assistance.

What this tells me is you have a DV source video that was converted to a VCD format rather than to a DVD-video format. I suspect you didn't choose DVD-video as the format type in the Toast Video window before adding your movie to Toast. Choose DVD-video and see how that goes.

 

VCD is a format for burning to CD media. It was briefly popular when DVD discs and DVD burners were expensive. Super VCD (SVCD) was another CD video option that had better picture quality but only fit about 30 minutes to a disc. Neither is popular today.

 

There is a setting on DVD players to enable the MPEG audio on those discs to be audible. Different DVD players use different terminology but on mine it is to have MPEG audio convert to PCM for playback. It is in the player's audio setup.

Edited by tsantee

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