It's been a while since I looked into these sorts of issues, but green is significant on YUV-encoded imagery, such as Jpegs, Mpeg4 and (I believe) H.264. It often means the deocding failed and the max amount of blue & red are being subtracted from the resulting image, making it green (i.e. sick) :)
It's possible the key frame was missing or had a decode error and therefore green, and you're seeing deltas applied to that green key frame, hence the little bits of "shape". Maybe some initialization data didn't make it? Hope that's a useful little tidbit. patbob On Tuesday 31 March 2009 1:24 pm, York Sun wrote: > Brad, > > I should be clear about the color. It is not random color. It is all > green, with a little bit shape here and there under vlc. mplayer shows > most black. > > I think it is something related to multicast. Just found an old post in > archive > http://lists.live555.com/pipermail/live-devel/2008-August/009323.html. > Ross seems to believe the missing key frame causes the green. > > I tried live555MediaServer and it streams OK. > > Here is what I am trying to do. I want to capture rtsp steams from > multiple IP cameras (MPEG4 or H.264), save the stream to the hard drive, > and also re-stream the video to unicast and/or multicast addresses. I am > hoping I can use the openRTSP and testMPEG4VideoStreamer as template and > put them together. Now it seems to be a little bit difficult for > multicasting. Please advise if it is even possible, or someone already > did it. > > Thanks, > > York > > On Tue, 2009-03-31 at 15:49 -0400, Brad Bitterman wrote: > > Not sure what would cause a color issue like what you're > > describing.... Live555 doesn't modify the frame data in any way so > > chroma info should not be modified. > > > > > > - Brad > > > > On Mar 30, 2009, at 10:34 PM, sun york-R58495 wrote: > > > Thanks for the hint. vlc can play the file with .m4v extension. That > > > at least proves the openRTSP works OK. I still don't know why > > > testMPEG4VideoStreamer sends the vague picture with wrong color. Is > > > it resolution issue? The sample para.m4e file streams OK. It has low > > > resolution, though. > > > > > > York > > > > > > > > > > > > -----Original Message----- > > > From: live-devel-boun...@ns.live555.com on behalf of Brad Bitterman > > > Sent: Mon 3/30/2009 19:51 > > > To: LIVE555 Streaming Media - development & use > > > Subject: Re: [Live-devel] stream m4e > > > > > > You can use ffmpeg to wrap the file into a mp4 container. I think > > > the > > > command is just the following: > > > > > > ./ffmpeg -i video-MP4V-ES-1 out.mp4 > > > > > > You should then be able to open the file with VLC. Also, ffmpeg > > > will > > > usually tell you if there are problems with the bitstream. I have > > > also > > > just renamed the file with a .m4v extension and VLC can play it > > > directly without any container. > > > > > > I have used openRTSP in the past to capture a stream from an Axis > > > camera and it worked fine. You might also want to turn the debug > > > log > > > level up in vlc and see if it reports any errors. > > > > > > - Brad > > > > > > On Mar 30, 2009, at 5:58 PM, York Sun wrote: > > > > I am new to this list. Tried to search the archive but didn't find > > > > > > a > > > > > > > good way. > > > > > > > > In short, I have difficulty to stream m4e by > > > > > > testMPEG4VideoStreamer. > > > > > > > The > > > > m4e comes from openRTSP (renamed from video-MP4V-ES-1), captured > > > > from my > > > > Axis camera, 640x480. I can see the picture with wrong color. vlc > > > > > > and > > > > > > > mplayer display different wrong color. I don't know which part is > > > > wrong. > > > > > > > > More info, if adding -i or -4 to openRTSP, the avi or mp4 file can > > > > > > be > > > > > > > correctly played by vlc and mplayer. I don't know how to verify > > > > > > the > > > > > > > m4e > > > > file. I can stream the sample para.m4e file. Only the very > > > > > > beginning > > > > > > > shows wrong color. > > > > > > > > Any help is appreciated. > > > > > > > > York > > > > > > > > _______________________________________________ > > > > live-devel mailing list > > > > live-devel@lists.live555.com > > > > http://lists.live555.com/mailman/listinfo/live-devel > > > > > > _______________________________________________ > > > live-devel mailing list > > > live-devel@lists.live555.com > > > http://lists.live555.com/mailman/listinfo/live-devel > > > > > > > > > > > > > > > > > > _______________________________________________ > > > live-devel mailing list > > > live-devel@lists.live555.com > > > http://lists.live555.com/mailman/listinfo/live-devel > > > > _______________________________________________ > > live-devel mailing list > > live-devel@lists.live555.com > > http://lists.live555.com/mailman/listinfo/live-devel > > _______________________________________________ > live-devel mailing list > live-devel@lists.live555.com > http://lists.live555.com/mailman/listinfo/live-devel _______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
