Ignore phone's output while recording nativescript - audio

I am trying to record over an existing audio file in nativescript core (js), the problem is that while I record, the output contains the audio file played through the phone speakers as well. Is there a way to ignore the output of the phone while recording?

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Recording lossless video from USB type capture card

I am using a third party capture card to record HDMI videos for testing purpose. Currently I am only able to record those using VLC media player. There are no command line parameters with the executable to record lossless (or of any type) video. With VLC I am doing
Media --> Open Capture device --> Capture Device (TAB)
Select Video device name(Auto detected)
Select Audio device name(Auto detected)
Select Convert from drop down menu
Create new profile and select RAW and create profile
Select destination for o/p stream and i click start.
Now i am able to do above thing to capture lossless raw video without any encoding.
I want to achieve this via python script. I have checked python-vlc but i have not came across any snippet that is doing recording from USB type capture card.
P.S. This problem has no direct reference to programming only.

Getting Speaker labels or Splitting audio file that contains dialogue between two person?

I have audio file that contains dialogue between two person I want to split audio file into two audio files that contains dialogue of both in separate file.
I am want to use this audio files further for Speech to Text.
Or
Getting Speaker labels about the dialogue spoken by each of them.
IBM provides Speaker labels but I want something other than IBM.
Is there any way of splitting the audio file according to speaker?
I want to do this through some API or program.

Why is my sound not playing on desktop but on mobile is playing?

I have mp3 file and I want to play it on my stack.
When I opencard I want to play sound on background.Here code:
on preopencard
play "/Users/PeshZ/Desktop/sound.mp3"
end preopencard
My sound not played.But on ipad it playing.
What's wrong?
To use "play audioclip" the sound file must be uncompressed wav, aif, or au. The LC engine cannot decompress sound files. The audioclip command is very old and has limited use, and it has been deprecated in favor of the player object.
You can play mp3 files on the desktop by setting the filename of a player object to the file path of the sound on disk. Players are much more flexible than the audioclip method.
iOS supports mp3 natively, which is why it plays there.
try play audioclip "/your/path"
By the way, google can provide this information within 3 seconds:
http://lessons.runrev.com/m/4071/l/25230-play-sounds

Record screen and audio then generate to one video file in java.

I am writting a program as http://www.screencast-o-matic.com/. I used applet and import jmf.jar to my project. When I use it, it couldn't get anything capture devices so it couldn't capture audio and video.
I captured screen to video but it hadn't sound. I captured sound but it hadn't video. I use jmf to merger 2 stream to video file. But it error.
Everybody can help me to resol problem. Thanks your help.
You can use Xuggle-Xuggler http://www.javacodegeeks.com/2011/02/introduction-xuggler-video-manipulation.html API which is wrapper of FFmpeg command line tool. Both are open source.

Hi-light text when audio file playing with corresponding words

I am developing one iphone application which is include the audio to text conversion.
The requirement is i have an audio file, while playing audio file the need to hi light text with corresponding word audio file.
Please anybody help me out of this issue.
Thanks in advance.
Vulvaji.

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