Develop Reference

c#/.NET - Recording the current audio being played

Is there any way in c#/.net of recording the current audio being played? I've searched a lot on the internet but the only result I could find is recording using a microphone.
I dont want to record using microphone input, I want to record what is being played on the computer when I click a record button.
Thanks

You have two options here:
Hardware loopback device - virtual "Stereo Mix" audio device, which acts as a regular audio capture device and in the same time produces a copy of mixed audio feed played through default audio output device of the system. Since such device shows up as real audio input device, you can use standard APIs, libraries and even exitsing applications to record from such device.
Programmatic access to a virtual loopback device as if it was microphone-like device. API on the background will duplicate played audio content and make it available for reading back as it plays. The good news is that you can access the mixed audio feed for device of your interest.
Both options are described in detail in Loopback Recording article on MSDN and available via standard audio APIs, specifically WASAPI.
For C# development you are likely to use a wrapper like NAudio.
For option 1 you will find quite a few questions on StackOverflow, and for the other option the keyword is AUDCLNT_STREAMFLAGS_LOOPBACK.

The only way to be able to receive data from another application is if the developer provides an access point, normally through some SDK, API, or other means. Without this, there is no way for your application code to receive the bytes from the other application.
The reason a microphone works is because it is receiving the sound output bytes from the application and sending those soundwave bytes back into your PC to render and output the sound. Since you have access to these bytes from the microphone you are able to capture the sound.
See if there is an API or an SDK from the developer of the application you are trying to get sound from.

C# Streaming from Panasonic IP camera using RTSP

I want to receive an RTSP stream from a Panasonic camera (Model WV-SPN531) and display the live video in my C# Form application.
If I use VLC and connect to "rtsp://IP_ADDRESS/MediaInput/h264/stream_1" the streaming works fine.
Codec: H264 - MPEG-4 AVC (part10) (h264)
Resolution: 1920x1080 (15 FPS)
I have tried this library, but it does not work: http://net7mma.codeplex.com/ .
I wrote to the developer of the library and I described the problem and he replied that: "There's not an available MPEG decoder in C# right now, not one which I know of immediately anyway."
Can you help me?

I have used this SDK to play RTSP video in C#
https://sourceforge.net/projects/onvifdm/files/%21sample_winform/
It uses a hosted executable to play the video but works very well
I also tested https://github.com/ZeBobo5/Vlc.DotNet before hand but the performance was a bit choppy compared with the above.

I am using the Datastead Rtsp source SDK to capture Panasonic, Axis and some other IP cameras.

Axis Camera video streaming with C# 64bit

I'm looking for a way to stream video from an AXIS M10 IP camera, and display the feed using windows forms (or better, wpf). However, it need to be running on 64-bit platform.
This means that I can't use the AXIS Media Control ActiveX component.
Also, I found that these methods work but only in 32bit environment:
1.Using MediaElement Class for WPF
2.Using embedded media player
3.VlcLib (for dotnet)
So far it looks like my only option is to directly implement RTSP protocol and decode the given RTP/AVP stream using Media Foundation (for .net) and display it somehow. (I was able to get the camera to stream to a UDP port using RTSP calls).
I'm fairly new to RTSP/streaming, so I'm concerned that I might be missing the big picture - Will I be able to use media foundation to render/display videos on winform/wpf, or do I have to look at that functionality elsewhere?(from my research it looked like it could decode H.264 streams, but I did not see any video-playing capabilities). I also came across DirectShow - should I use DirectShow over Media Foundation?
Or better yet, is there a library that is able to handle RTSP streaming that runs in 64bit?

VisioForge Video Capture SDK .Net for example (but commercial), WPF controls included.
Decoding using FFMPEG, with DirectShow engine. Really, I don't see any Media Foundation advantages here.
Also any other way using FFMPEG.
Or, you can write RTSP source filter (based on DirectShow Push Source sample) with H264 output pin for video and G726/G711/AAC for audio. Also you can made virtual video capture source filter and use it in MF or DirectShow. You can use live555 library for RTSP implementation.
So, no simple ways here, if you are starting from zero.

If you just need the Video, I would prefer to just display the MJPEG stream of the camera. This is really easy done without the complexity of DirectShow or MediaFoundation. I display 12 cameras at the same time in my application with this little library in WPF: MJPEG Decoder. You can also use it in WinForms. It decodes the MJPEG Stream and gives you the images to display.

The 64 bits Axis Media Control SDK is available now, but requires an account on Axis web site to be downloaded.
After Sign in, you need to join Axis Developper program (free) and download the AMC SDK.
You will install a executable file (.exe), this install all the libs and samples in your Drive
C:\Program Files\Axis Communication\SDK

I found a way to use VLC in 64bits without ActiveX DLL :
The VLCSharp Library is composed of multiple NuGets to use VLC Player on severals platforms (WPF, Winforms, Xamarion, TvOS).
It is working fine on Onvif Cameras

Whats the best C# Way to stream a H.264 Video to another computer/device on a network? Is there a library/API For this? File Sharing?

I am experimenting with C#, and I wanted to create a fun/useful network program. I've programmed for most of my years using C++, C# seems a lot cleaner and easier to program in. I mostly programmed data structures and algorithms. I haven't really touched networking much.
I have video files on my computer that I would like to be able to share/stream/send to other computers on my network. I'm going to eventually expand on it and add a lot of features, but I want to conquer the hardest part first.
Is there a library out that helps with the data management for this?
I see accomplishing this three ways, Idk what's easiest and best.
Maybe using Windows File Sharing (Like how other computers on a network can open videos in a shared folder?)
Streaming the video data to the client computer? Then having their native video program open the data stream? (Buffer-like on youtube?)
Silverlight or some other Library. I can use the built in video player, etc to run it
Features:
I want to allow the client to be able to copy the video tutorial file to their own computer eventually if necessary, so idk. Maybe buffering is the best solution.
Want to allow the client to pause/download the video.
Hopefully I can learn a lot in this project.

You can use Microsoft Expression Encoder SDK to push video stream to a local port, or publish it in Windows or IIS Media Services. Windows Media Player, Silverlight or player-based application can be used for playback on another computer. Also, the are some options for playback on Apple devices. For H.264 support, you would need Pro version of the encoder.
For more information see the SDK documentation on MSDN, and articles Getting started with IIS Live Smooth Streaming and Apple HTTP Live Streaming with IIS Media Services.

You should be able to use vlc to transcode the file (or just stream it) then connect to the stream it produces. I know you're experimenting with C#, but it seems odd to re-invent the wheel, especially when it's such a good one!
I'm sure you'd have some fun automating vlc.

C# video player that supports streaming?

I want to add a video player in my Windows Form that would be able to stream videos (flv) from internet (web-server). So far i've tried Microsoft Windows Media Player and it's working but I don't like it because of its lags and bugs and etc.
So are there any other video players that can be easily embedded in a Windows Form and that support video streaming? (by streaming I don't mean something like live TV streaming, but just downloading (buffering) and playing at the same time the video)

Perhaps you can embed VLC as an ActiveX component?

There is a Flash ActiveX control which (I expect) would handle these natively.