The VideoLAN Forums

Posted: **15 Jan 2011 00:19**

Hello.
I have a client that plays network stream.

    const char * const vlc_argv[] = {
              "-I", "dummy", 
              "--ignore-config", 
              "--plugin-path=C:\\Program Files\\VideoLAN\\VLC\\plugins\\"};
     
	 libvlc_instance_t * inst;
     libvlc_media_player_t *mp;
	 libvlc_media_t *m;

	 inst = libvlc_new (sizeof(vlc_argv)/sizeof(vlc_argv[0]),vlc_argv);
	 m = libvlc_media_new_path (inst, "udp://127.0.0.1@127.0.0.1:1234");
	 
	 mp = libvlc_media_player_new_from_media (m);
	 
	 libvlc_media_player_play (mp);
	 Sleep (10000); /* Let it play a bit */
     libvlc_media_player_stop (mp);
     libvlc_media_player_release (mp);
	 libvlc_media_release (m);
     libvlc_release (inst);

It plays MPEG2-TS (Mpeg2/Ac3). I want to transcode it to MPEG2-TS(wmv3/wma).
Libvlc doesn't support wmv3.
How can i get raw bytes from libvlc_media_t pointer 188 bytes packets for further processing?

Posted: **15 Jan 2011 11:48**

MPEG2-TS(wmv3/wma) You cannot do wmv in mpeg2-ts! You must use asf!

Posted: **18 Mar 2011 21:17**

Thank you for reply.
Ok,I should write vc1 advanced profile, but not wmv. http://www.microsoft.com/windows/window ... rview.aspx
I have already finished transcoding from mpeg2 ES -> vc1 bitstream.

Now I need to:
1)mux vc1/wma into:
1.1)ASF and output should be as http
1.2)mpeg2-ts and output should be as udp&http.
2)transcode from mpeg2audio&ac3 -> wma?

Can I do all these things using libvlc?

Posted: **18 Mar 2011 22:43**

1.1 is possible.
2) yes

Posted: **19 Mar 2011 18:48**

Posted: **31 Mar 2011 21:17**

Hi Jean-Baptiste Kempf.
In the final, I need to do 1.1 using memory, without using files. I have a live stream (wvc1 encoded bitstream).
Is there any way to do that? If yes, what mechanism is used, how client and VLC share memory and what command line params needed for VLC?
There is other way: I can send wvc1 bitstream as udp output (from my app), and VLC will catch this stream and transcode, output will be as http. But, I don't want to do it in such manner at all.
Many thanks.

Posted: **31 Mar 2011 22:45**

Have you ever heard of pipes/FIFOs?

Posted: **01 Apr 2011 07:49**

Yes, I worked with named pipes (WinAPI).

Posted: **03 Apr 2011 21:14**

Could you provide more info/link about interprocess communication?
I need to mux raw wvc1(VC-1 AP) elementary stream to ASF container. I try this:
vlc k:\samples\test.vc1 --sout #std{access=file,mux=asf,dst=k:\samples\test.asf}
It creates file and writes < 1kb. What do I wrong?
For example, if the input is test.m2v (mpeg2 Elementary stream) everything works great.
J-B said that VLC can mux wvc1 to ASF.
Thanks to all, who helps me.

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