Develop Reference

Play video file being written

I developed a socket based p2p system where i stream mp4 video from a client to a server. The video data are transferred using byte[].
The transfer works, however i am struggling to figure out how i could play, in continuous, a mp4 file being transferred to another PC? The PC application, that would play the file, is in WPF.
I tried using a MediaElement to play the file, being written to the disk, but for some reason it doesnt play at all. I can play it with VideoLan tho.
Any hint of where to look? I am lost from here!
Thanks in advance!

Its going to be different with every player. Mp4 is probably the worst possible container for this application. The container is designed to be used with random access media, such has a hard disk. The player has the ability, and sometimes requirement to seek around within the file, and not just plat start to finish. Either you need to make the protocol mp4 aware (parse the file, and download the block that will most like be needed next), or use a streamable container such as TS, or flv.
Its is also possible that the player knows the file is incomplete. The atoms sizes are encoded within the file. If the file size doest match, the combined atom sizes, the player could assume a corrupt file.If this is what is happening, you can try to pre allocate the file. it may trick the player enough to play

Extracting and splitting a MP3 audio stream from an AVI file

I want to develop a desktop application by programming in C# and using the .Net framework 4.
The goal of my application is to extract a MP3 audio stream from a supplied AVI file.
I have learned from the Internet that an AVI file is a container and it might contain different audio streams.
If the supplied AVI file contains one MP3 audio stream at least then I want to extract it and split it.
I want to split the MP3 audio stream into MP3 audio parts identified with a start time and an end time.
I have looked on the Internet for any .Net library I could use but without success.
Does someone know what documented .Net library would be useful ?

Maybe you can try this:
Simple C# Wrapper for the AviFile Library
It is targeted at AVI video but there might be some clues as how to use the same methods to extract the audio only.
Either use it as-is or use the example to incorporate what you need into your own code.

Since tools for this task already exist, I see no point in creating another one unless you're curious about how to do this yourself and learn something new.
If so, using a ready-made library would defeat the entire idea of learning something which is why I strongly recommend you try implementing the splitter yourself.
You can find descriptions of the AVI file format online, that should get you started.

Edit mp3 in c# on a uploaded file from asp.net

I would like to know how I could edit mp3 files on the server once it was uploaded from the user browser.
I am going to use a windows service on the server to process it, which is basically cut a specific piece of the mp3 uploaded by the user given the start and end period of time..
Is there any native .net library to do that? do I need third party libraries?
thanks

Here is an example from Stackoverflow:
Trim an Audio File(.wav,.mp3)
I don't know if this is exactly what you want, but it is a good starting point.

How to play mp3 file from a different server in .NET 2.0 (c#/vb.net)?

I want to create a window application which will play an mp3 file, which will be on a different server.
For an example,
I have a URL (http://songs.mastemag.com/indian-movie-songs/L/download.php?get=2cdeb5bfb354f297e97ba6b6b3b53203&file=1/love-aaj-kal/01%20~%20Twist%20(MastiMag.com).mp3). I want to play this file from window application on my local machine without downloading this file.(with the help of streaming)
I have code that is using 'winmm.dll' and plays local mp3 file. Is there a way in which I can use this dll to play this kind of file.
You can also suggest me any other approach as well.

Take a look at NAudio

The simple way will be to use the Window Media Player Control (in hidden mode).
It can work with http urls and local (file) urls.
Howto: use it with .NET

How do I split an mp3 file into smaller files?

I want to make a program that takes an MP3 file and breaks it into many smaller mp3 files based on 1-2 seconds of no sound (silence).
What is the easiest way to do this in c#?

Bass library. Bass has everything you need. It can access, record and edit media streams like mp3s, allowing you to sample the volume at different time points. It has a .net api, so you can use it in c#. Unfortunately it does cost money if you are using it for a commercial application, but they do provide a free non-commercial license.
Sox is a command-line tool which has an option to split an mp3 on n seconds of silence. You could always use the system command to call sox from c#.
Other related links.
Ripping a CD to mp3 in C# - third party component or api out there?
Audio Libraries for MP3 editing
How do I merge/join mp3 files with c#
This code shows a way to make a CD
ripper in C#. There are APIs from some
vendors that allow reading audio CD
tracks but it is also possible to do
it using APIs that allow low level
access to CD drives such as ASPI from
Adaptec or IOCTL control codes. The
latter method is used in this case,
because there is no need to install
any third party software, it is
completely covered by Win32 API
functions.
http://www.codeproject.com/KB/cs/csharpripper.aspx

Splitting the MP3 stream will be difficult to do with any degree of precision. The compressed MP3 data exists as sequential chunks of audio data comprised of many samples. The easiest way to perform this would be to decode the stream either progressively or in its entirety, perform your manipulation, then re-encode it (which as I understand is how most jukebox software does it)

Having a solid knowledge of the file's binary format would be a good place to start. That done, you'll know what silence looks like in the file. You may have to define exactly what silence is. Presuming that, like most audio, it started from an analog source, there's almost certainly some noise buried in the "silence". What will your tolerance for ambient/background noise be?
Once you know what you're looking for, just scan through the file, looking for "it".
Simple ...

A program to do this already exists:
http://mp3splt.sourceforge.net/mp3splt_page/home.php