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How to convert video files to H.264 in C#

I've searched without any luck about how this can be done in C#. What i'm trying to archieve is a program that accepts video files and converts them to H.264. Here is an example of a page where you can do this interactively:
http://www.ofoct.com/video-converter/convert-to-h-264-video.html
Question:
How can I in .NET create a program that can do something similar to whats being done from that homepage I shared? Any help or input is highly appreciated, thanks!
EDIT:
The reason i want to do this is because it seems like videos play in both iOS and Android devices when this is done, perhapps there is another way to make sure videos can play in both iOS and Android?
EDIT again:
Lets say i film a Video on a phone Android/iOS, now I'm using a ASP.NET web api that I'd like to convert theese movies to H.264 before storing in Azure, Is this possible? If so, any pointers on how?

There is a wrapper available http://www.ffmpeg-csharp.com/
The main point is that no one is going to write an encoder due to how slow it would be in .NET

Encoding/decoding are provided by the OS, through Direct Show (in the past) or Microsoft Media Foundation. For example, the Microsoft Media Foundation already contains a [H.264 Video Encoder](H.264 Video Encoder).
The SDK is appropriate for C++ and Microsoft hasn't released a wrapper. There are wrapper projects available though, eg. MF.Net, DirectShow.NET, WindowsMedia.NET although it doesn't have any activity since 2012.
There are also similar questions in StackOverflow, that propose other options, like using Microsoft's Encoder, although H.264 support is available only in the Pro version

The only plausable way would be to call out to an encoding application such as ffmpeg.

I'm not sure that this what you need but you can download a nuget called
NR.VideoConverter :> then you can write this code to convert the type of video
like from mp4 to mvo or anything I'm not sure what is h264 but I did find it when I wanted to change my videos so it could help y
var converter = new NReco.VideoConverter.FFMpegConverter();
converter.ConvertMedia(FilePath, FilePath, NReco.VideoConverter.Format.h264);

video/audio downloader and format convertor

I want to create video downloader using C#. It will download videos from youtube, metacafe and me other websites. It should be able to download audios as well. Also, It need to convert videos to different formats.
Examples are:
http://www.vso-software.fr/products/downloader/vso-downloader.php
http://xviservicethief.sourceforge.net/index.php?action=informatio
Please suggest any third party libraries that I can use or how to do it?
Thanks.

For Youtube, take a look at YoutubeExtractor

Since Flagbug's library is a bit dated, I've written one from the ground-up. It's called libvideo, and you can find it on GitHub here. Please enjoy!

Detect DTMF Tones C#

I have wav file in which using the naudio lib i have been able to get raw data out of the wav files.
Does any one know how to loop though the data in chuncks detecting DTMF tones?

The NuGet package DtmfDetection.NAudio provides extension methods and wrappers to detect DTMF tones in live (captured) audio and pre-recorded audio files.
On the GitHub site of the project you can find a sample program.

Well, on the top of the google is this:
http://sourceforge.net/projects/dtmf-cs/
But, if you want to use heavy artillery, you can always FFT your samples and check what two freqs are seen the most.
BTW, do some searching before you post anything, and you'll come up with:
Detect a specific frequency/tone from raw wave-data
or even
Is it possible to detect DTMF tones using C#

I've gone with http://www.tapiex.com/ToneDecoder.Net.htm
Its cheeap and does a good job at detection. All the others i found dont seem to do the job or have no documentation

DTMF stands for dual-tone multi frequence signaling. So you have to detect the two frequencies used to send a signal.
You have to transform your timebased audio material into the frequency domain typically by using a FFT algorithm.
Here i found a very old VB5 program with source online which does exactly what you want i think: http://www.qsl.net/kb5ryo/dtmf.htm
EDIT: Ok, maybe its better to take a look at the suggested C# lib.

C# capture screen to small video files

Does someone knows how can I capture my computer screen to a video file? I need the file to be as small as possible. I'm using C#. Third party components also welcome.
TY

I think you are referring to creating a screen cast, if so this is the best I have used.
http://www.techsmith.com/camtasia.asp
It can produce many formats including FLV which can be configured to small file size.

You could take a look at ScapLib, and see if that suits your needs.

Directly capturing video from the desktop in .net does not seem to be a simple task. Here's an article from c-sharpcorner that might help you out: Link.

How can I create a thumbnail from an mpg video with C#?

I'd like to process a directory of mpg's in a batch to have a thumbnail using C#/.NET.
Does anyone have any good suggestions on how I could do this?

I know it's not C# .NET but ffmpeg is a great tool to do exactly this. Can be run as a command line tool from any language.
Here's a small tutorial to get you started.

I did this a few years ago, but I seem to have lost the source. Anyway, the route-of-least-resistance I found was to use DirectShow, there is an interop wrapper for managed code, namely directshow.net. You'll want to use IMediaDet's GetBitmapBits from the Windows Media Format SDK.
There is an example on CodeProject: Extract Frames from Video Files