Extracting lossless audio

Sandra24 · 29th October 2008, 02:46

Hey there!

I've got a mpeg2 video from a minidv camcorder transferred to my computer via firewire!

The camcorder records the audio in PCM wave (lossless)!

How do I extract the audio stream to wav (lossless)?

I did look for PCM wave, but couldn't find any satisfying results...

Sandra

edit: When I open the mpeg2 video in mediainfo it says MPEG Audio 224kbps 48KHz, which is actually lossy? Any idea what went wrong with the lossless audio stream?

linyx · 29th October 2008, 03:04

ReJig or vobedit can extract it.

Sandra24 · 29th October 2008, 03:05

Thanks for your help linyx!

BUT:

Have you read my edit

Any idea about that problem?

rica · 29th October 2008, 03:08

You may use eac3to:

eac3to input.file output.wav

or for multiple monowavs;

eac3to input.file output.wavs

Edit:Sorry i've just realized you are using a mpeg2 camcorder; which means it makes mpa (mpg audio/ or ac3), so you have to re-encode it to pcm. But command line which i gave above is gonna work in transcoding job.

Sandra24 · 29th October 2008, 03:14

^ ok thank you rica, but why does mediainfo say that it's MPEG AUDIO?

Isn't that lossy then?

I want to guarantee it's 100% lossless!

rica · 29th October 2008, 03:22

sandra, i've edited my post.
I'm afraid it must be lossy since it's compressed(/encoded) to mpeg2.
If it were a classical DV camcorder, you would get pcm but in your case you should transcode it if you wanna get the pcm.

Sandra24 · 29th October 2008, 03:31

OK, but why does it say on the front of the camcorder PCM lossless audio?

What did I do wrong?

:/

rica · 29th October 2008, 03:33

Quote:

Originally Posted by Sandra24

OK, but why does it say on the front of the camcorder PCM lossless audio?

What did I do wrong?

:/

Could you upload a short sample as is?
Or simply say what camcorder you are using.

Sandra24 · 29th October 2008, 03:54

Panasonic NV GS 3

rica · 29th October 2008, 04:17

It seems not an mpg2 camcorder but a classical DV camcorder.
So i suspect of your capture/recording method.
And it is time to upload a short sample.

You have to capture DV as is.
I suppose your capturing software makes re-encoding; that is the problem.

Sandra24 · 30th October 2008, 23:31

I just opened the raw dv avi file with mediainfo and it says PCM audio, which means it's lossless...

So what's the best way to extract the audio stream from this avi file to wav?

linyx · 30th October 2008, 23:43

AviMuxGui, hit generate data source from files, then extract your pcm stream.

rica · 31st October 2008, 01:20

I was using Amcap; suppose it's not freeware now.
(But an evaluation version still exists.)

29th October 2008, 02:46	#1 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	Extracting lossless audio Hey there! I've got a mpeg2 video from a minidv camcorder transferred to my computer via firewire! The camcorder records the audio in PCM wave (lossless)! How do I extract the audio stream to wav (lossless)? I did look for PCM wave, but couldn't find any satisfying results... Sandra edit: When I open the mpeg2 video in mediainfo it says MPEG Audio 224kbps 48KHz, which is actually lossy? Any idea what went wrong with the lossless audio stream? Last edited by Sandra24; 29th October 2008 at 03:03.

29th October 2008, 03:08	#4 \| Link
rica Registered User Join Date: Mar 2008 Posts: 2,021	You may use eac3to: eac3to input.file output.wav or for multiple monowavs; eac3to input.file output.wavs Edit:Sorry i've just realized you are using a mpeg2 camcorder; which means it makes mpa (mpg audio/ or ac3), so you have to re-encode it to pcm. But command line which i gave above is gonna work in transcoding job. Last edited by rica; 29th October 2008 at 03:29.

29th October 2008, 03:22	#6 \| Link
rica Registered User Join Date: Mar 2008 Posts: 2,021	sandra, i've edited my post. I'm afraid it must be lossy since it's compressed(/encoded) to mpeg2. If it were a classical DV camcorder, you would get pcm but in your case you should transcode it if you wanna get the pcm. Last edited by rica; 29th October 2008 at 03:29.

29th October 2008, 04:17	#10 \| Link
rica Registered User Join Date: Mar 2008 Posts: 2,021	It seems not an mpg2 camcorder but a classical DV camcorder. So i suspect of your capture/recording method. And it is time to upload a short sample. You have to capture DV as is. I suppose your capturing software makes re-encoding; that is the problem. Last edited by rica; 29th October 2008 at 04:40.

31st October 2008, 01:20	#13 \| Link
rica Registered User Join Date: Mar 2008 Posts: 2,021	I was using Amcap; suppose it's not freeware now. (But an evaluation version still exists.) Last edited by rica; 31st October 2008 at 01:23.

29th October 2008, 03:04	#2 \| Link
linyx Un-Registered User Join Date: Mar 2008 Location: Audio Stream - 0x80 Posts: 341	ReJig or vobedit can extract it.

29th October 2008, 03:05	#3 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	Thanks for your help linyx! BUT: Have you read my edit Any idea about that problem?

29th October 2008, 03:14	#5 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	^ ok thank you rica, but why does mediainfo say that it's MPEG AUDIO? Isn't that lossy then? I want to guarantee it's 100% lossless!

29th October 2008, 03:31	#7 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	OK, but why does it say on the front of the camcorder PCM lossless audio? What did I do wrong? :/

29th October 2008, 03:54	#9 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	Panasonic NV GS 3

30th October 2008, 23:31	#11 \| Link
Sandra24 Registered User Join Date: Sep 2008 Posts: 24	I just opened the raw dv avi file with mediainfo and it says PCM audio, which means it's lossless... So what's the best way to extract the audio stream from this avi file to wav?

30th October 2008, 23:43	#12 \| Link
linyx Un-Registered User Join Date: Mar 2008 Location: Audio Stream - 0x80 Posts: 341	AviMuxGui, hit generate data source from files, then extract your pcm stream.

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