[Live-devel] stream m4e

[York Sun]

Brad,

My camera is AXIS M1011 Network Camera. I have no idea about the key
frame on camera.

My recording is 100 seconds lone. However, with testMPEG4VideoStreamer
and vlc as a client, I can only see the green picture for about 5
seconds, then the picture freezes and vlc message says

ffmpeg decoder error: more than 5 seconds of late video -> dropping
frame (computer too slow ?)

On the other hand, vlc can play the recorded file if rename it to .m4v.

York


On Tue, 2009-03-31 at 16:55 -0400, Brad Bitterman wrote:
> Oh! I think I know exactly what your seeing. I have seen this before  
> many times with VLC. What happens for me is that the time between i- 
> frames is very long. When I connect with VLC i only get p-frames for a  
> while. The green is because the initial decoded picture buffer in VLC  
> is filled with all zeros which in YUV land is green. The little shapes  
> you see are the motion vectors that are being decoded against the  
> green buffer.
> 
> How long is the clip you captured? What is the key frame interval set  
> to on the Axis camera?
> 
> - Brad
> 
> On Mar 31, 2009, at 4:24 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-bounces at 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 at lists.live555.com
> >>>> http://lists.live555.com/mailman/listinfo/live-devel
> >>>
> >>> _______________________________________________
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> >>> http://lists.live555.com/mailman/listinfo/live-devel
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
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> >>
> >>
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