Seperating audio from video

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Rburrhead32
Seperating audio from video
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I have tried everything I can to get an answer to the following question.
FAQ's, 3 different AUDACITY FORUM sites and the Help List archive.

How do I send AUDACITY audio-only from an output that containes --audio & video combined?


I am using AUDACITY  1.2.6
Windows XP Service Pack2
IE-7

Please help me if you can?
Thank You

Robert G Burrell
NEVER FORGET
9/11/01

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Re: Seperating audio from video
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    | From Rburrhead32
    | Sat, 8 Sep 2007 14:16:29 EDT
    | Subject: [Audacity-help] Seperating audio from video
    | I have tried everything I can to get an answer to the following question.
    | FAQ's, 3 different AUDACITY FORUM sites and the Help List archive.

There is only one official Audacity Forum:
http://www.audacityteam.org/forum/

    | How do I send AUDACITY audio-only from an output that containes
    | audio & video combined?
    | I am using AUDACITY  1.2.6
    | Windows XP Service Pack2   IE-7

You should have been able to find an answer in one of our -help list archives
with appropriate keywords, as the question is asked from time to time e.g. this:
http://www.nabble.com/forum/Search.jtp?query=combined+audio+video&local=y&forum=4506

Anyway, Audacity does not recognize combined audio and video input.  
You need to capture the combined stream as a normal video file and then
extract the audio from the video with a video editor or software like
SuperPlayer:
http://www.erightsoft.com/SUPER.html#Dnload

You should encode the output audio file to 44 100 Hz 16 bit PCM WAV so that
the encoding does not create any audio losses. You can encode the audio to a
lossy compressed format like MP3 if desired after editing in Audacity:
http://audacity.sourceforge.net/help/faq?s=install&i=lame-mp3


Gale Andrews
 




   


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Richard Ash (audacity-help)
Re: Seperating audio from video
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On Sat, 2007-09-08 at 14:16 -0400, Rburrhead32@... wrote:

>
> I have tried everything I can to get an answer to the following
> question.
> FAQ's, 3 different AUDACITY FORUM sites and the Help List archive.
>
> How do I send AUDACITY audio-only from an output that containes
> --audio & video combined?
>
>
> I am using AUDACITY  1.2.6
> Windows XP Service Pack2
> IE-7

Not with audacity. Audacity records from your sound card or other audio
capture hardware.

Without knowing what you mean by "an output that contains audio and
video combined" it's impossible to give much in the way of advice - this
could be anything from a UHF downlead to a MPEG PES.

If you mean you want to use a video capture device to record in in
audacity, audacity can't record from video capture hardware, so you
would have to use a video application that can to make the recording,
then a video manipulation package to separate out the audio data to a
file, then import the audio file into audacity.

If you mean you have a combined signal coming from some other piece of
equipment that you are trying to connect to your computer, then it
depends entirely on what form that signal is in. You can get an adaptor
cable to connect a SCART socket to a PC sound card and so get at the
audio signals that way. To get a TV antenna signal (UHF signal) into a
sound card you would need a video tuner to receive it first, then take
the audio from that. A VCR with audio out connectors might be a good way
of doing this.

Richard Ash


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Rburrhead32
Re: Seperating audio from video
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Dear Gale Andrews,

Thank you for answering. I am recording music from the TV and there are video stills in the recording. I am new to all this (not used to FORUMS) and do not know what I am doing, also I have never used AUDACITY as of yet. I am still studying how to use it.
I am trying the best I can
Thanks anyway

Robert G Burrell
NEVER FORGET
9/11/01

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Re: Seperating audio from video
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    | From Rburrhead32
    | Sun, 9 Sep 2007 14:16:21 EDT
    | Subject: [Audacity-help] Seperating audio from video
    | I am recording music from the TV and there are video stills in the
    | recording. I am new to all this (not used to FORUMS) and do not
    | know what I am doing, also I have never used AUDACITY as of yet.
    | I am still studying how to use it. [1.2.6 XP SP2]

This is a mailing list where questions and answers are emails. On a Forum
the questions and answers are posted to web pages, so that you have to
go to the web site to see the questions and answers. However you can
usually choose to receive email notifications if someone answers the question
you posted on the Forum.

Your answer seems to suggest you are using a video capture device so have
a stream with sound and video combined, or possibly already have a saved
video file with video stills and audio combined? Is either correct? If so you
must extract the audio from the saved video file by dragging it into
SuperPlayer and exporting as a 44 100 Hz 16 bit stereo WAV file which you
can then either keep as it is, or import into Audacity for editing. If you don't
want to edit it, you can encode the audio to a much smaller format like
MP3 if you don't mind losing a little of the quality.

Does your TV actually have a SCART jack as many do, or even an audio out
or line-out as some advanced models will have? Then if you only want the
audio you can either buy a SCART to 1/8 inch audio adaptor which you
can then connect to the line-in (usually blue) port of your sound card, or
if you have an audio or line out, do so using an appropriate cable with a 1/4
inch plug one end to go in the TV audio out, and a 1/8 inch plug at the other
end to go in the computer line-in.  

Or if you have a video cassette recorder, connect the TV to the VCR and
connect the line-out or audio out of the VCR to line-in of the computer.
Once you have such an audio-only input going into Audacity you can then
set the recording device on the Audio I/O tab of Audacity Preferences to
your sound card and record according to these instructions (which are meant
for all input coming from the line-in):
http://audacity.sourceforge.net/help/faq?s=recording&i=records-tapes         
 
Or you can get a TV Tuner card including external USB ones that mean you
don't have to open the computer to fit them. USB tuners will often include
video capture software so that video from TV can be saved to the drive as
a video file. USB tuner cards may not have a coaxial input for a conventional
TV antenna. If that's true, you can get a coaxial to composite (yellow/red/white)
adaptor, and such adaptors often have RCA outputs in which case the audio
can be taken from there with a RCA to 1/8 inch cable and recorded into line-in
on the computer as above.

So there are really many ways to capture either audio only from the TV, or to
capture a video file and and then extract the audio from the video file if you
want it separately (or if you want to edit the audio and then insert it back into
the video).      
     

Gale Andrews



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