Cannot stream from device

buloheart · Postby **buloheart** » 15 Oct 2014 10:15

I've been trying to use nVLC (more info here: http://www.codeproject.com/Articles/109639/nVLC) to stream video directly from a camera as it is captured. Below is the code that doesn't stream anything (the commented libvlc calls following any line of code is what nVLC calls in turn)

Code: Select all

/* Not working */

Declarations.IMediaPlayerFactory factory = new Implementation.MediaPlayerFactory();
//m_hMediaLib = LibVlcMethods.libvlc_new(args.Length, args); {"-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins"}
//LibVlcMethods.libvlc_log_set(m_instance, hCallback, IntPtr.Zero);

string sout = ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}";
media = factory.CreateMedia(@"dshow://", WebCams[InputDeviceSelection.SelectedIndex].ToString(), sout);
//m_hMedia = LibVlcMethods.libvlc_media_new_location(m_hMediaLib, m_path.ToUtf8()); "dshow://"
//LibVlcMethods.libvlc_media_add_option(m_hMedia, item.ToUtf8()); "[0] Sony Visual Communication Camera: SOME_GUID"
//LibVlcMethods.libvlc_media_add_option(m_hMedia, item.ToUtf8()); ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}"

renderPlayer = factory.CreatePlayer();
//LibVlcMethods.libvlc_media_player_new(m_hMediaLib);
//LibVlcMethods.libvlc_media_player_retain(m_hMediaPlayer);

renderPlayer.Open(media);
//LibVlcMethods.libvlc_media_player_set_media(m_hMediaPlayer, ((INativePointer)media).Pointer);

renderPlayer.Play();
//LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);

Now the below two works, but one streams from file, the other displays from camera

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/* Working streaming file */

var input = @"C:\Users\buloheart\Downloads\SomeVideo.mkv";
Declarations.IMediaPlayerFactory factory = new Implementation.MediaPlayerFactory();
//m_hMediaLib = LibVlcMethods.libvlc_new(args.Length, args); {"-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins"}
//LibVlcMethods.libvlc_log_set(m_instance, hCallback, IntPtr.Zero);

string sout = ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}";
media = factory.CreateMedia(input, sout);
//m_hMedia = LibVlcMethods.libvlc_media_new_path(m_hMediaLib, m_path.ToUtf8());
//LibVlcMethods.libvlc_media_add_option(m_hMedia, item.ToUtf8()); ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}"

renderPlayer = factory.CreatePlayer();
//LibVlcMethods.libvlc_media_player_new(m_hMediaLib);
//LibVlcMethods.libvlc_media_player_retain(m_hMediaPlayer);

renderPlayer.Open(media);
//LibVlcMethods.libvlc_media_player_set_media(m_hMediaPlayer, ((INativePointer)media).Pointer);

renderPlayer.Play();
//LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);
/**/

Code: Select all

/* Working displaying from camera */

Declarations.IMediaPlayerFactory factory = new Implementation.MediaPlayerFactory();
//m_hMediaLib = LibVlcMethods.libvlc_new(args.Length, args); {"-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins"}
//LibVlcMethods.libvlc_log_set(m_instance, hCallback, IntPtr.Zero);

media = factory.CreateMedia(@"dshow://", WebCams[InputDeviceSelection.SelectedIndex].ToString());
//m_hMedia = LibVlcMethods.libvlc_media_new_location(m_hMediaLib, m_path.ToUtf8()); "dshow://"
//LibVlcMethods.libvlc_media_add_option(m_hMedia, item.ToUtf8()); "[0] Sony Visual Communication Camera: SOME_GUID"

renderPlayer = factory.CreatePlayer();
//LibVlcMethods.libvlc_media_player_new(m_hMediaLib);
//LibVlcMethods.libvlc_media_player_retain(m_hMediaPlayer);

renderPlayer.WindowHandle = PreviewPictureBox.Handle;
//LibVlcMethods.libvlc_media_player_set_hwnd(m_hMediaPlayer, value);

renderPlayer.Open(media);
//LibVlcMethods.libvlc_media_player_set_media(m_hMediaPlayer, ((INativePointer)media).Pointer);

renderPlayer.Play();
//LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);

/**/

Can anyone help me figure out why the first one which tries to stream directly from webcam is not working? What is missing/wrong?

Thanks...

buloheart · Postby **buloheart** » 17 Oct 2014 16:18

I'm uploading the below version as well as it would be easier to follow for many people:

Code: Select all

/* Below shows webcam on the picturebox */
var args = new string[] { "-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins" };
var m_path = "dshow://";
var m_hMediaLib = LibVlcWrapper.LibVlcMethods.libvlc_new(args.Length, args);
var m_hMedia = LibVlcWrapper.LibVlcMethods.libvlc_media_new_location(m_hMediaLib, ToUtf8(m_path));
var m_hMediaPlayer = LibVlcWrapper.LibVlcMethods.libvlc_media_player_new_from_media(m_hMedia);
var item = "[0] Sony Visual Communication Camera: SOME_GUID";
LibVlcWrapper.LibVlcMethods.libvlc_media_add_option(m_hMedia, ToUtf8(item));
LibVlcWrapper.LibVlcMethods.libvlc_media_player_set_hwnd(m_hMediaPlayer, PreviewPictureBox.Handle);
LibVlcWrapper.LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);
/**/

/* Below streams video file */
var args = new string[] { "-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins" };
var m_path = @"C:\Users\buloheart\Downloads\silvvvv.mkv";
var m_hMediaLib = LibVlcWrapper.LibVlcMethods.libvlc_new(args.Length, args);
var m_hMedia = LibVlcWrapper.LibVlcMethods.libvlc_media_new_path(m_hMediaLib, ToUtf8(m_path));
var m_hMediaPlayer = LibVlcWrapper.LibVlcMethods.libvlc_media_player_new_from_media(m_hMedia);
var item = ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}";
LibVlcWrapper.LibVlcMethods.libvlc_media_add_option(m_hMedia, ToUtf8(item));
LibVlcWrapper.LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);
/**/

/* Below does NOT stream from webcam */
var args = new string[] {"-I", "dumy", "--ignore-config", "--no-osd", "--disable-screensaver", "--plugin-path=./plugins"};
var m_path = "dshow://";
var m_hMediaLib = LibVlcWrapper.LibVlcMethods.libvlc_new(args.Length, args);
var m_hMedia = LibVlcWrapper.LibVlcMethods.libvlc_media_new_location(m_hMediaLib, ToUtf8(m_path));
var m_hMediaPlayer = LibVlcWrapper.LibVlcMethods.libvlc_media_player_new_from_media(m_hMedia);
var item = "[0] Sony Visual Communication Camera: SOME_GUID";
LibVlcWrapper.LibVlcMethods.libvlc_media_add_option(m_hMedia, ToUtf8(item));
item = ":sout=#rtp{dst=127.0.0.1,port=5004,ttl=40,mux=ts}";
LibVlcWrapper.LibVlcMethods.libvlc_media_add_option(m_hMedia, ToUtf8(item));
LibVlcWrapper.LibVlcMethods.libvlc_media_player_play(m_hMediaPlayer);
/**/

Postby **Jean-Baptiste Kempf** » 10 Dec 2014 15:13

Without logs, it's hard.

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