Process WAV files to report how much silence at beginning

We need a program that will process WAV files in the following way:

1) Identify the presence of a new WAV file in a directory

2) Process the first 30 seconds of the file (or less if the file is less than 30 seconds in length). the 30 second parameter should be something that can be easily changed, although that value can be embedded in the code

3) From the very beginning of the recording, determine how many milliseconds of silence until the first sound on the recording

4) Report these as an output: (1) filename, (2) number of milliseconds. Write those values to a log file or other output, to be determined.

The program must use a minimum of CPU processing power. We were trying to use this with a free utility and it was taking too much CPU. This is why we want to process only the first 30 seconds, but even with that, the program must operate efficiently enough that we can run this on a server that is also running other operations (specifically, call recording). When we test the program, it cannot use more than 10% of the CPU power.

The deliverable must include the source code. It can be in any language our current staff supports, which include: C++, Java and PhP.

I've set the price based on the assumption that this is simple and requires only specific domain knowledge of audio processing, but feel free to bid higher if you think that's required for the project.

Because we have a few good proposals, please answer the following, in addition:

1) Multiple files may be written to the folder at the same time. Can you insure that the program will not miss any files. There would be over 10000 files that need to be processed in about 8 hours.

2) Can you get the cpu usage to below 5%, rather than the 10% originally stated?

We are also providing some file samples to show you the files we are currently creating.

Taidot: C-ohjelmointi, Java, Windows Server

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Tietoa työnantajasta:
( 87 arvostelua ) Charlotte, United States

Projektin tunnus: #14725180

Myönnetty käyttäjälle:


I can write a code which can parse wav audio file and prints various properties, please reply, thank you!

$99 USD 2 päivässä
(103 Arvostelua)

27 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


Hello, I have worked with WAV before... so, I know how to read these files. So, I would read the rate of the wav (for example 44100 Hz), and then, read as few samples as necessary (to reduce overhead) Habilidades y ex Lisää

$200 USD 5 päivässä
(85 arvostelua)

hello,how are you. i read your bid carefully. i am c/c++, java/javafx, wav file expert and have full experience for 10 years. c++, java language is my top skill. i can provide most quality and high speed. if you wa Lisää

$155 USD 3 päivässä
(68 arvostelua)

I am very proficient in c and c++. I have 16 years c++ developing experience now, and have worked for more than 7 years. My work is online game developing, and mainly focus on client side, using c++ under Windows envir Lisää

$150 USD 3 päivässä
(121 arvostelua)
$277 USD 6 päivässä
(46 arvostelua)

I am an expert in delivering custom scripts and softwares willing to discuss further details about the project Relevant Skills and Experience proven track record on this site Proposed Milestones $111 USD - milestone

$111 USD 3 päivässä
(71 arvostelua)

Hey A Java expert developer is here Sir Sir I can do this task for you in java as per your need I have good advanced expertise in java and javafx Feel Free to message me Regards Relevant Skills and Experience Java Jav Lisää

$200 USD 10 päivässä
(129 arvostelua)

I would like to discuss on chat: what is the target platform, where to modify settings - GUI or file (max. scan duration, silence threshold, input directory), what is preferred output format/method. Relevant Skills an Lisää

$155 USD 4 päivässä
(24 arvostelua)
$155 USD 3 päivässä
(21 arvostelua)

Hi, I have a idea about how to write the program for you, but I am a Linux developer, do you mind the program run under Linux? Relevant Skills and Experience I got a similar project before, it's a voice command proje Lisää

$200 USD 2 päivässä
(10 arvostelua)

Hello there, I'm a a low-level C and C++ R&D engineer from a consumer electronics background. Used to work for Yamaha Pro Audio in London on complex Motif synthesizers and channel mixers. Your requirement (assum Lisää

$300 USD 3 päivässä
(12 arvostelua)

I'm a computer science professional with a PhD degree and extensive experience in C and C++. I've done many programming projects in C/C++ and other languages. I can do this in C++. The only nontrivial part of this j Lisää

$150 USD 3 päivässä
(40 arvostelua)

Hi, I would do this in c . My offer is valid if the WAV format is uncompressed. Otherwise it would be higher and longer. Relevant Skills and Experience I'm an experienced programmer. Some time ago I've developed syst Lisää

$150 USD 7 päivässä
(10 arvostelua)

You can see my last project which are based on Algorithm Development Machine Learning and I can complete your project perfectly. Relevant Skills and Experience We have 10+ years experience in software development. We Lisää

$200 USD 3 päivässä
(23 arvostelua)

Greetings, we are a team of 35 developers and 20 designers and each having more than 8 years experience. I would very much happy to work with you on your project and I have already checked detail your requirement and Lisää

$155 USD 3 päivässä
(2 arvostelua)
$30 USD 1 päivässä
(8 arvostelua)

Hello. I am c/java programmer. I am read your job carefully and am interested in your job. Hoping to contact with you and discuss further. thanks. Relevant Skills and Experience C++, java, php, Android, iOS Lisää

$150 USD 3 päivässä
(3 arvostelua)

i can implement your requirement within specified cpu limit.

$120 USD 3 päivässä
(1 arvostelu)

I have experience on Audio/Video file processing and streaming. I can do this work. Lets discuss Relevant Skills and Experience C, C++, PHP, Streaming, Proposed Milestones $333 USD - Open

$333 USD 3 päivässä
(2 arvostelua)

As you have duly assessed, this application requires some basic sound processing and can be developed within the criteria stated. The application will have the following basic structure/form: - It will be developed Lisää

$111 USD 3 päivässä
(0 arvostelua)

Dear Prospect Hiring Manager. Thank you for giving me a chance to bid on your project. I am a serious bidder here and I have already worked on a similar project Relevant Skills and Experience I have checked your requi Lisää

$133 USD 3 päivässä
(0 arvostelua)