I'm currently developing a popcorn-time like app for Windows 8.1/WP8.1, and I would like to know how I could possibly stream a torrent file? How complex would it be to get a video stream, starting with what I have available in this API: https://yts.to/api/ (aka, a magnet link and a list of trackers)?
Technically speaking, Popcorn Time is a bittorrent client (like utorrent) with video player support.
You will have to implement the bittorrent protocol or get an existent lib (monotorrent, ...) to work.
You will need to:
Read torrent file (or magnet)
Connect with trackers
Get a list of peers
Connect with peers
Download and upload pieces
To stream, I believe it basically means that the torrent should be downloaded sequentially.
Be careful with legal stuff.
Related
I'm trying to figure out how to grab the individual audio streams as they appear in the audio mixer to reroute them to an aggregate audio device. I'm specifically looking to keep them as discreet streams for the purposes of the program I'm making (If they're muxed down to a 2-channel mix, that defeats the purposes of what I'm trying to achieve.)
E.X.: (As I've just made this account, I apparently am not able to post images, so here's a link to the image)
windows audio mixer
In this, I'm hoping to grab "System Sounds" and "Stream Client Bootstrapper" as discreet audio streams to route elsewhere, while maintaining their original destination as well (essentially copying the audio going to the original audio device to another simultaneously).
I'm looking to do this in either C# or C++. I've perused the audio APIs that microsoft has published, and while some things look to be close to what I'm trying to do, nothing has hit the nail on the head. I appreciate any help. Thanks.
The sessions can be enumerated using IAudioSessionManager2::GetSessionEnumerator and friends (sample C++ code is here and there). Standard Windows volume mixer application is using this API as well.
The API however has no access to data streams, you won't have either (you certainly don't have data whether they are downmixed or not). Neither you can reroute streams to another device. Applications are not allowed to interfere that deep. The best you can do is to create your own device, interactively select it as default output device and then accept data from applications playing audio through this device.
I have a video server with an IP:192.168.1.XX
It has 3 possible formats JPEG, MPEG-4 or H.264
The video server is broadcasting a video(with audio) on real time
I have no problems streaming the video with AFORGE lib
but i also need to stream the audio
the video server has several protocols: HTTP,RTSP,RTP,RTCP
according to the user's manual RTSP is the protocol I should use to get MPEG-4(Audio and video), but I haven't found anything to stream by RTSP on C# so I'm trying to stream audio and video separate
the ports are:
RTSP: 554
RTP(Video): 5556
RTP(Audio):5558
RTCP(Video): 5557
RTCP(Audio): 5559
Does any body know how RTP works or how can I get the sound from the video server?
I would learn gstreamer. I am assuming that you are using windows since you are doing this in C#. It has a fairly stable windows port with a nice .net wrapper. If you aren't using Windows, then gstreamer is most certainly your best bet.
In gstreamer you would most likely use a pipeline like:
your video src -> x264enc or ffenc_mpv4 -> rtph264pay or rtpmp4vpay -> udpsink
your audio src -> ffenc_aac or preferably a lower latency codec like mULaw -> rtppay -> udpsink
and so on. It is very easy to use. They even have a nice rtpbin for your to use if you want to actually manage an rtp session.
More information can be found here:
http://gstreamer.freedesktop.org/
Here is a nice sample of how to do rtp:
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-gstrtpbin.html
I have done this sort of thing with the direct show filters but it is much more involved. You usually have to manually handle the rtp payloading and the transport--not to mention deal with COM--whereas GStreamer provides those mechanisms for you out of the box.
You can use https://net7mma.codeplex.com/
It is a C# Media Server and it will get you each RtpPacket and from there you can get them to a Decoder of your choice among other things all without bogging down the source stream.
How i can get stream from Ip Camera, Its using RTP, stream is MPEG4, i have multicast address and port,and i have ip camera's IP address and Port Number. And I cant reach via http forexample (http://ip/jpeg) And I cant reach stream with VLC Player too. forexample (rtp://ipadressofcam:port) and (rtp://multicastaddress:port)
So What is ffmpeg command of that?
I have windows OS, I only write code with C# right now.
But producer created their own ocx which used for viewing cam,that plugin can work on .net but i dont want to use it becouse it doesnt have much funcionality, I mean you cant get current picture or snapshot of cams, thats why i have to do it myself.
Are you sure the stream is not password-protected?
Try to see why your camera rejects VLC requests. And this is how to do it: Install Wireshark, start it, and put a filter for the camera address, like: ip.addr == camera_ip (xxxx.xxxx.xxxx.xxxx). Then, try to connect with VLC, and look there at the messages exchanged. If you see a DROP, UNAUTH, or something that tells you to use a passwd, introduce it. (VLC will first try to connect using an unauthenticated procedure, and if it fails, will ask for a passwd.)
Wireshark will give you clues if the failure reason is something different.
And keep in mind that if VLC can't access it, the chance to find some other way to do it is almost zero. Unless you're a video guru.
Hope it helps!
You can use VLC for such a thing ,and it's ActiveX control which is available for .NET also ,just need to install VLC Media Player and you can set it's control on VS toolbox
http://forum.videolan.org/viewtopic.php?f=32&t=54969
UPDATE
If you are ready to pay for this stuff you can use http://www.mainconcept.com/products/sdks/video.html this Company product's to advance with Decoding and Encoding ,where you can find a huge Library .
So you want to receive video stream from camera and convert individual frame into JPEG file. This sounds good and actually sounds natural: why not? there is a video feed being sent on network and we don't need much, just to pick individual frame.
The original stream is MPEG-4 (Part 2) and desired target encoding is JPEG. This breaks the task into parts of getting MPEG-4 video feed, decoding it into uncompressed images, and encoding into JPEG. Let us go through these from the last one backwards.
JPEG is a popular encoding and there are various codecs with different interface capable of compressing into JPEG. Options include GDI+ API, IJG JPEG library libjpeg, JPEG libraries and codecs for video with DirectShow and other interfaces.
MPEG-4 decoder is a complicated component, however is luckily well standardized and available in different interfaces and from several sources. In particular MPEG-4 Part 2 Video Decoder is shipped as DMO (and also through ) with Windows 7. Decoder is also available as DirectShow filter in ffdshow, Intel Media SDK.
Back to the first step, you need to reach MPEG-4 stream from network. First of all you indicated that the camera is available on multi-cast UDP address. This makes you open a socket and put into onto multi-cast group in order to start receiving RTP data. The data you would receive is not pure MPEG-4 yet, and is formatted according to RTP Payload Format for MPEG-4 Audio/Visual Streams and as you receive RTP stream of messages you will have to be prepared to receive out of order fragments, packet losses etc. You are supposed to receive what you can receive, check the RTP headers, and do your best in reconstructing MPEG-4 feed.
Eventually you need to cover these steps (not necessarily directly, you would rather use third party libraries including those mentioned in other answers) from your application and build a pipeline which stitches together receiving from network and transcoding.
So until now, I saw VLC cant open it but if we create .sdp file and play it with ffplay only a black screen appears.
vlc -vvv dshow:// --sout-keep --sout-all --sout=#rtp{dst=multicastaddress,port=portNo,sdp=file:///C:/test/my.sdp}
Of course this is not pure solution but there is little bit hope.
But obsolute solution can be like that;
There is no way to use just c# to achive what i intend. There are few c++ library components that i can use, but i can use it along with Managed c++ to write interop services and use those dlls in my c# code.Here is what i need:
1-I need an RTP Library, http://research.edm.uhasselt.be/~jori/page/index.php?n=CS.Jrtplib or live555 but live555 has certain limitations.
2-RTP Library is the transport for the MPEG4 stream i pull from my encoder. But i need ways to control the stream, those are provided producer's WSDLs.
3-After that i need a decoder; Libavcodec, I can use libavcodec to convert an Iframe to a jpeg image in .net.
We are trying to find out any technologies/libraries available in .NET stack (even wrappers on top of 3rd party dlls) that'll help us to build an app that can
1 - Capture an image from a user's video device
2 - Upload it realtime to a server
3 - Process the video (in the server) - eg: Adding a watermark to the video
4 - Stream it back to the user/other users
Preferably, the time delay/latency between step2 and 4 should be minimal
The first requirement (capturing) seems pretty straight forward. The challenge is identifying a suitable way to do the upload, do the processing, and stream it back. Any valid suggestions or ideas?
Recently came acrsoss FFmpeg library, and it has a C# wrapper. Does FFmpeg can be used to do the processing side?
I would go about it this way:
Use silverlight or flash to capture the video camera input, e.g. as detailed here.
You can send the byte-stream over a socket that your server is listening to.
On the receiving end, just use the socket-accepting program as a router-program with a number of listening workers connected. Between workers and router-program, e.g. AMQP with RabbitMQ. Send asynchronous messages (e.g. with reactive extensions) with e.g. the stream encoding to the rabbit-node, which then can either further all messages to one single computer as a part of a conversation/user-session, or interleave between the available workers. Here's the manual. As the video is encoded, it is streamed asynchronously over the message bus back. According to intel tests the bus itself should work well at high throughputs, but they had to use the interleaved tcp channel mode (they tested on a gigabit lan). Other users here have suggested FFlib. You might also look into having the workers convert into webM, but if FFlib works, that might be a lot easier. Each worker publishes over AMQP the next encoded video piece. A server-running program, e.g. the router program I talked about before, starts sending to the client (see no. 4)
Have a client-program, e.g. silverlight/flash connect (for example over the same socket that you opened for client->server data, or over HTTP), and read the byte-stream with a decoder. Render the output.
VideoLab from Mitov can accomplish all of this and is free for personal use (not so free for commercial use, but pricing is not too heavy).
I have bought and use the Delphi version and know it works extremely well, so I'm pretty sure the .NET version will do what you need.
This kind of task is not trivial (as seen by the lack of responses here), so expect to struggle considerably with DirectX/Microsoft Media Encoder- but with this toolkit and some help from the author, you will eventually succeed.
http://www.mitov.com/html/videolab.html
It seems that Splicer can process static video and convert it - I'm not sure about processing a realtime uploaded video - http://splicer.codeplex.com/
Take a look at Video.Show by Vertigo. It's an open source website for user-generated video content. It uses the Expression Encoder to handle compression/video editing. It's not exactly what you need, but it's a good start!
You could use Silverlight for capture as is mentioned above, and then use Expression Encoder to push it to a stream server or stream from there directly.
It should have everything you need:
Smart encoding/smart recompression for
WMV if the source is also WMV and no
frame operations are performed [4],
cuts editing, serial batch encoding,
Live encoding from webcams and DV
camcorders
Decoding/import format support because
of DirectShow
Smooth streaming (720p+ video using
HTTP) with optimized client
(Silverlight) and server (IIS with
smooth streaming)
WebDAV publishing, publishing plugins
for Silverlight Streaming, Amazon S3
Importing XAML overlays created in
Expression Design and customizing
their timing, animation, opacity,
placement and looping
JavaScript trigger events
Windows Media 11 SDK and VC-1 SDK
integration, native MPEG-2 decoder
Adding captions to videos using SAMI
or W3C Timed Text format
Previewing and comparing encoding
settings in real time
Screen capture
Object model for the encoding engine,
SDK downloadable separately
The question is kind of short on details (is this a web server, what os is the server? etc) but I'll take a stab based on what I think you're trying to do.
One thing you might consider is doing the capture and process at one time. If the user is running your client app, have that do the capture and processing via DirectShow. Then all you need to do is upload the video and you can skip the entire server process. This is assuming that the 'user' is under your control - that this is not some random person out there uploading video, but an employee or someone otherwise trusted.
If this isnt the case, then ffmpeg can certainly be used to watermark video on your server. You dont really need 'wrappers' for it. You can just call it as a command line app from your server application and wait for it to finish.
The process really isnt that complex... its the details that are going to matter (for example - what does 'stream' mean to you? Do you really mean 'stream', or is this via http? Thats a huge topic right there)
I want to provide a choice between streaming 'channels', if you will, in a web application. These are Windows Media streams of live events that are being broadcast from a Windows Media Services 9 distribution network.
I want to provide a relatively recent thumbnail image of the stream (as a user, you would expect to see this), but although I've seen this done in Flash on CNN and countless other sites, I've never seen this done with Windows Media.
I already have a C# / DirectX library that can extract a thumbnail from a WMV file, but obviously the stream doesn't come from a file if it's a live source.
My assumptions so far are:
Will need to run some kind of service application/daemon that will receive a stream into a Windows Media Player object and somehow take thumbnails if WMPlayer supports it...
-or-
Configure the streams to archive to file, and use the existing class library to take a peek at the last frame available in the archive file being written to get the thumbnail.
I would much rather do #1 because it seems like the clean solution, but don't know if/how WMPlayer supports grabbing a frame.
Are there better ways of doing this?
Not sure if using media player is a good idea in such case. I would look into this:
http://sourceforge.net/projects/windowsmedianet/