> > On Tue, 2008-02-12 at 01:39 -0500, Aaron Lindsey wrote: >> I've written an rtp sender and receiver based on the test3v example for >> streaming mpeg4 video. When I set them both up to run, they would each >> show output indicating that everything was running fine. The pipeline >> was linked and playing, etc, etc. However, no video would be displayed >> (videotestsrc on the sender and xvimagesink on the receiver). The only >> way I've been able to get video to show up, is by grabbing the pipeline >> from the stream on the receiver and setting the "send-config" attribute >> on the payloader. Like this: >> >> pipeline = farsight_stream_get_pipeline( videoStream ); >> pay = gst_bin_get_by_name( GST_BIN( pipeline ), "rtpmp4vpay0" ); >> g_object_set( G_OBJECT( pay ), "send-config", TRUE, NULL ); >> >> If I do that, it works. Is it standard to do this? It feels like >> something that I'm messing up elsewhere and then duct taping here. The >> test programs definitely don't do this anywhere. Also, this is with >> farsight 0.1.25. Thanks. > > What you are doing is right. The MPEG-4 codec requires configuration > information to be sent to initialise the decoder before playback can > start. But the current send-config is not ideal, since we are streaming > over UDP and it could get lost. The payloaders for mpeg4 (but also some > other codecs like Theora, etc), should be modified to be able to resend > the config information regularly in case the first one is lost. The > other way to do it is to read it from the caps and send it in the sdp > (but that's very annoying to do with codec negotiation, because that > means you'd have to initialise every encoder before doing the offer). > > -- > Olivier Crête > [EMAIL PROTECTED] > Collabora Ltd
Thanks for the explanation. That helps a lot. Aaron ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Farsight-devel mailing list Farsight-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/farsight-devel
