MP4 video with low sound level

[charlie]

Question/How to

Source: GOPro3 camera
Output: MP4 A/V file
Problem: Records and plays back at a low sound level when played back
via win and other players.
Is there an application that can:
Increase the volume and separate the audio into an audio only file?

 

[Paul]

Question/How to

Source: GOPro3 camera
Output: MP4 A/V file
Problem: Records and plays back at a low sound level when played back
via win and other players.
Is there an application that can:
Increase the volume and separate the audio into an audio only file?

Movie editor. Or...

Movie editor plus the free Audacity. The movie editor may be able to
separate the sound track from the video track, and give you a file that
you can feed into Audacity. Audacity may not support enough file
formats, to be able to accept just about anything.

http://audacity.sourceforge.net/

Audacity has a "Normalize" function, which finds the peak sound level in
a sound file, and scales the sound to that level. That means the loudest
sound won't be clipped. If you still need more gain, then you might
need audio companding or the like. (You're not likely to need it for
a professionally edited movie. But other sound sources might have
a section that should have been edited, and would prevent Normalize
from doing an acceptable job.) You would need to load the entire
movie sound track, to normalize everything to the same level. Or,
keep track of the level used, and apply amplification of the exact
same amount, to each chapter.

http://en.wikipedia.org/wiki/Companding

And you might be able to find a tool mentioned, on one of the
specialized sites for such things.

http://forum.videohelp.com/threads/339307-Audio-Normalizing

I've noticed in the past, that the sound recording level on
a movie DVD seems to be rather low. If you're sending AC3 from
a movie over SPDIF cable, your computer cannot change the level
on the AC3 samples. The stereo (receiver) getting the audio
signal as digital samples, the volume control there is what
you can use. If the AC3 is decoded on the computer, and feeds an analog
audio card, the computer volume control would work in
that case. If your audio travels over HDMI (as digital
samples), I don't know right off hand what happens there.
Whether the samples are preserved all the way to the
Home Theater system, or the computer can scale the digital
samples and offer a volume control that works. With LPCM
(linear pulse code modulation) on a movie disc, there wouldn't
be a decoding stage as such, whereas with some sort of Dolby option,
there could be decoding going on, on the Home Theater.

No matter what you do, it's going to be a learning experience.

Paul

 

[Auric__]

Question/How to

Source: GOPro3 camera
Output: MP4 A/V file
Problem: Records and plays back at a low sound level when played back
via win and other players.
Is there an application that can:
Increase the volume and separate the audio into an audio only file?

VLC:

http://www.videolan.org/vlc/

 

[charlie]

VLC:

http://www.videolan.org/vlc/

VLC can increase the sound level during playback. Don't know about any
other useful features for this task. I'm not into A/V stuff.
I'm still trying to sort out how to get the sound separated.

Before MS and others seriously munged the sound system,
all I had to do was use the recorder to record the "line".
Sadly, that was several windows versions ago.

 

[pjp]

Question/How to

Source: GOPro3 camera
Output: MP4 A/V file
Problem: Records and plays back at a low sound level when played back
via win and other players.
Is there an application that can:
Increase the volume and separate the audio into an audio only file?

Depending upon underlying video/audio format the old VirtualDub allows
you to do that.

 

[John Williamson]

VLC can increase the sound level during playback. Don't know about any
other useful features for this task. I'm not into A/V stuff.
I'm still trying to sort out how to get the sound separated.

Before MS and others seriously munged the sound system,
all I had to do was use the recorder to record the "line".
Sadly, that was several windows versions ago.

To seperate the sound from just about any video format, try Super.

http://www.erightsoft.com/SUPER.html

It's the Swiss Army Knife of video converters. Drag any file you want to
convert into the box, tell the program what you want to get out, and the
new transcoded version is put wherever you tell it to (Default is the
root of your C: drive, which isn't very intuitive.). It is free, both as
in beer and as in speech, as it's completely open source.

The download procedure is a bit temperamental, and it likes to phone
home when it's opened, just to make sure there's a real internet
connection there. The download problem just means following the
instructions on the website exactly, and the phoning home problem is
handled by a rule in your firewall, if you think it's worth the effort,
as it's just a ping to the writers' server with no information being
passed apart from your IP address for the return packet.

Once you've saved the sound track as .wav, .mp3, .ogg, .flac or even
..aiff according to your workflow, you can normalise it in your favourite
sound editor.

 

[J. P. Gilliver (John)]

In message <[email protected]>, John Williamson

To seperate the sound from just about any video format, try Super.

http://www.erightsoft.com/SUPER.html

It's the Swiss Army Knife of video converters. Drag any file you want []
The download procedure is a bit temperamental, and it likes to phone

You're not kidding (-:

home when it's opened, just to make sure there's a real internet
connection there. The download problem just means following the
instructions on the website exactly, and the phoning home problem is
handled by a rule in your firewall, if you think it's worth the effort,
as it's just a ping to the writers' server with no information being
passed apart from your IP address for the return packet.

Does it refuse to work if that ping is blocked? I'm puzzled why a prog.
that is supposed to be just a video (etc.) handler needs to know if
there's a real internet connection, especially since it says it includes
all necessary CoDecs.
[]
--
J. P. Gilliver. UMRA: 1960/<1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

TV and radio presenters are just like many people, except they tend to wear
make-up all the time. Especially the radio presenters. - Eddie Mair, in Radio
Times 25-31 August 2012

 

[Gene E. Bloch]

In message <[email protected]>, John Williamson

To seperate the sound from just about any video format, try Super.

http://www.erightsoft.com/SUPER.html

It's the Swiss Army Knife of video converters. Drag any file you want []
The download procedure is a bit temperamental, and it likes to phone

You're not kidding (-:

home when it's opened, just to make sure there's a real internet
connection there. The download problem just means following the
instructions on the website exactly, and the phoning home problem is
handled by a rule in your firewall, if you think it's worth the effort,
as it's just a ping to the writers' server with no information being
passed apart from your IP address for the return packet.

Does it refuse to work if that ping is blocked? I'm puzzled why a prog.
that is supposed to be just a video (etc.) handler needs to know if
there's a real internet connection, especially since it says it includes
all necessary CoDecs.
[]

I started to install Super a month or two ago.

By the time I figured out how to actually download Super and not a bunch
of other stuff, I had spent a half hour, maybe more. Then I looked at
its licensing and privacy documents and decided not to install it.

It has always been hard to get the download of Super on the Super
website, but if I had read the privacy stuff before, I hadn't realized
that it seemed so odd to me.

I don't even remember what all it said, but I do remember saying
fare-thee-well to the installation.