Audio chopping up

jehrler · Post by **jehrler** » Mon Feb 19, 2007 4:57 pm

I saw in the bug tracker something about audio nastiness but am not technically astute enough to figure out if that is the same issue.

I have encoded a 10 minute chapter from a lite-on DVD Recorder once with Handbrake and twice with MediaFork (.80b1) using AVC/ H.264 Video/ AAC Audio. I have also set the option in MediaFork to use the iPod friendly extensions. The Handbrake one is perfect, but both MediaFork files have had chopped up audio that makes it unusable.

This is on a MacBook Core2Duo running 10.4.8 with 2GB of Ram.

jbrjake · Post by **jbrjake** » Mon Feb 19, 2007 5:06 pm

jehrler wrote: The Handbrake one is perfect, but both MediaFork files have had chopped up audio that makes it unusable.

Well, that's certainly disturbing.

What movie is this? Is it the original disc or a burned backup?

What happens when you rip the disc to your hard drive and encode from that instead of from your optical drive?

You're using iPod friendly extensions...did you also choose x264 (iPod) as the encoding style?

jehrler · Post by **jehrler** » Mon Feb 19, 2007 6:01 pm

This is a burned disc that was created by a DVD Recorder from an over the air network broadcast of a TV show.

I ripped the dvd to disk and tried it again and had the same issue.

jehrler · Post by **jehrler** » Wed Feb 28, 2007 4:36 am

Just a bump in case this got lost in the switch over.

My audio problem is occuring on DVDs created by a Lite-On DVD-VR and then MediaForked.

There are no issues when using HandBrake.

Attempting to rip with MTR and then HandBrake yielded the same issue.

jbrjake · Post by **jbrjake** » Wed Feb 28, 2007 6:03 am

jehrler wrote:Just a bump in case this got lost in the switch over.

Yeah it got lost. Sorry. Moving back to bugs...

So this is happening with all discs from the Lite-On, not just one disc "from an over the air network broadcast of a TV show" ?

jehrler · Post by **jehrler** » Wed Feb 28, 2007 12:58 pm

jbrjake wrote:
jehrler wrote:Just a bump in case this got lost in the switch over.
Yeah it got lost. Sorry. Moving back to bugs...

So this is happening with all discs from the Lite-On, not just one disc "from an over the air network broadcast of a TV show" ?

Yup. We record PBS's Nova each week and then put it on the iPod. This issue has occurred on all. I tried it again on a brand new Nova and it happened.

Note that this is not doing a complete dvd, just a chapter (10 minutes) but, again, this works fine in HB.

I can send a 43MB file via yousendit that has the issue. I can also post the screen shots of the settings for that rip.

jbrjake · Post by **jbrjake** » Wed Feb 28, 2007 3:45 pm

jehrler wrote:Yup. We record PBS's Nova each week and then put it on the iPod. This issue has occurred on all. I tried it again on a brand new Nova and it happened.

What applications are you using to record and burn the Nova eps? Does Lite-On have some special proprietary burning software, or does it just use the system services or Toast?

I guess, yeah, put up a short clip somewhere. I suggest mediafire over yousendit.

jehrler · Post by **jehrler** » Wed Feb 28, 2007 3:57 pm

Hmmm. Clearly I'm not being clear.

This is being recorded on a standalone DVD reorder (http://www.liteonit.com/global/index.ph ... &Itemid=62 )that has a built in tuner. Thus, the software that creates the dvds is part of the firmware/hardware of the dvd recorder.

I'm uploading to mediafire now.

edit: Well I was till they went down. Will try later.

jehrler · Post by **jehrler** » Thu Mar 01, 2007 3:57 pm

Ok, finally got mediafire to work.

Here is the file: http://www.mediafire.com/?3lewczlnyn5

nite · Post by **nite** » Tue Mar 06, 2007 5:01 am

hmm this sounds like the problem I'm having too. mine were recorded from tv w/ a standalone burner in real time also. (I have no idea witch one though)

fullstop102 · Post by **fullstop102** » Fri Mar 09, 2007 11:39 pm

exactly the same issue here. stand alone recorder on dvd+rw and the sound is all messed up whichever format sound or video I choose. the audio section picks the audio as unknown mpeg in the chooser

rhester · Post by **rhester** » Fri Mar 09, 2007 11:57 pm

Sounds like MP2 audio instead of AC3 - very common on home video recorders.

HandBrake was designed to read MPEG audio, but it's clear there's a gap as far as MP2 handling is concerned, given the multiple reports centered around home recorders.

We'll look into it.

Rodney

jehrler · Post by **jehrler** » Sat Mar 10, 2007 4:59 am

That makes a lot of sense. Just to be clear, though, at least in my case HandBrake works fine, it is just MediaFork that is hiccuping.

Thanks for taking a look.

fullstop102 · Post by **fullstop102** » Sat Mar 10, 2007 9:49 am

yeah I just ran the same dvd through handbrake and it is perfect using 0.7.1.

very strange. thanks anyway I can use handbrake until this is resolved.

your all doing a great job

jehrler · Post by **jehrler** » Sat Mar 10, 2007 1:18 pm

Do you guys need a DVD recorded on one of this standalone recorders for testing? I'd be happy to send one if so.

nite · Post by **nite** » Sun Mar 11, 2007 6:12 pm

ya handbreak 0.7.1. worked here also. thanks

jehrler · Post by **jehrler** » Tue Apr 24, 2007 4:11 pm

Not that this is a surprise given that it was not listed in the bug fixes, but the latest beta still has audio stuttering on home made DVDs.

Beege · Post by **Beege** » Wed Apr 25, 2007 5:14 pm

I also received the same results with the following DVD's (using MTR)

IRON MAN
GROSSE POINT (although on 4th attempt it worked, no change in settings)
MARINE UNRATED (both the unrated and pg13 version)

sometimes the audio would only be in there in 2-3 minute incrememnts, and sometimes when it was in there it was out of sync as well.

maurj · Post by **maurj** » Fri Apr 27, 2007 8:07 am

There's a known problem in HandBrake 0.8.5b1 for DVDs with MPEG2 audio. This will include virtually all home-made DVDs, as most DVD burner apps will be encoding your audio in MPEG2 format. It should be working - all the infrastructure is in place to support MPEG2 audio in HandBrake - but something is broken.

Note: It did work fine in HandBrake 0.7.1, but a *lot* has changed since then.

I'm hoping to get chance to have a look at this and try and fix it for a future beta!

- maurj.

ajmas · Post by **ajmas** » Fri Apr 27, 2007 12:40 pm

I am also having the same issue. At the moment I am having to use VLC to do the job, but since HandBrake offers some extra features I would rather be using that.

In VLC it indicates the audio track is 'mpga', though not sure what codec tht is.

EDIT: did a little more research and 'mpga' is mpeg-1/layer-3 (aka MP3)

ggjj · Post by **ggjj** » Mon Apr 30, 2007 10:17 am

With 0.8.5b1 I also get the audio chopped up for just one certain DVD that otherwise plays perfectly.

There are bursts of about 0.1 seconds of sound followed by about the same duration of silence, alternating continuously.

Using HB 0.7.1 however doesn't create this effect.

maurj · Post by **maurj** » Mon Apr 30, 2007 6:25 pm

Hi ggjj,

Most likely this DVD has an MPEG2 audio track rather than an AC3 track - could you check? It should say MPEG on the audio dropdown in HandBrake.

- maurj.

ggjj · Post by **ggjj** » Mon Apr 30, 2007 9:03 pm

maurj wrote:
Most likely this DVD has an MPEG2 audio track rather than an AC3 track - could you check? It should say MPEG on the audio dropdown in HandBrake.

- maurj.

Yes - it says "English (MPEG)".
Is this a known issue? Is there a known workaround?

pmoc · Post by **pmoc** » Tue May 01, 2007 5:09 pm

I'm using the latest SVN of HB and I encounter the same problem as described before with mpeg sound DVD.

Hope this helps. Philippe.

awk · Post by **awk** » Tue May 01, 2007 6:48 pm

pmoc wrote:I'm using the latest SVN of HB and I encounter the same problem as described before with mpeg sound DVD.

Hope this helps. Philippe.

http://handbrake.m0k.org/trac/ticket/51

Is probably the 'best' ticket for this (though the title could probably do with updating). I'm looking into the problem - I don't have an ETA for a fix however.

HandBrake

Audio chopping up

Audio chopping up

Re: Audio chopping up

0.8.5b1 update

Also on Commercial DVD's

Same here

Chopping sound here too with MPEG sound track DVD

Re: Chopping sound here too with MPEG sound track DVD