How can i compare Audio, what programming language should i use
- by Pimmetje
I have 2 audio files that are from almost the same source. But at some points there shifted a bit. Also the codecs does not match.
I would like to make a program that takes a sample 2 - 4 seconds. And looks for it in the other file. (Most of the time it's not shifted more than 30 seconds). Than take the time and store it, Go ahead for a few seconds take a sample and find it again. This way i want to create a file where i can see on what points the file is shifted.
For people who are more interested in what i want. I have a audio/video file speech and subtitles. But i have same speech from different sources with differs a bit in time. And i like to make a program that can correct the subtitle time for me.
Enough about the problem
I looked on the Internet for ways to compare audio files. Based on what i read comparing 2 audio files isn't that easy as i had hoped.
Some talk about algorithms
http://www.perlmonks.org/?node_id=169641
Some audio-library's
portaudio.com
aubio.org
sourceforge.net/projects/ccaudio/
ambiera.com/irrklang/
The biggest problem i have is that i can't find something i can generate from the audio that i can use to compare with.
I hope someone here can point me in the right direction.
