The VideoLAN Forums

Posted: **17 Sep 2005 04:19**

I am transcoding a MPEG 4 stream from an Axis 232D camera to a lower bit rate using ffmpeg. I was trying to relay the stream with Darwin Streaming Server and the stream would stop streaming after about 2 minutes. I started trouble shooting. Using the command line below I get the same results with VLC streaming UDP but the stream stops about 5 to 10 seconds later.

Code: Select all

./VLC rtsp://192.168.0.90:554/mpeg4/media.amp --sout '#transcode{vcodec=mp4v,vb=450,venc=ffmpeg{keyint=45,fps=15}}:duplicate{dst=std{access=udp,mux=ts,url=68.35.96.91:13000,ttl=25}}'

If I replace the input of the above command with a local AVI file the stream works as expected and never drops out.

When I use -vvv with the RTSP stream I get the following output with the last 2 lines repeating them selves.

Any ideas?

[00000255] stream_out_duplicate private debug: duplicated a new stream codec=mp4v (es=0 group=0)
[00000263] main private debug: adding a new input
[00000263] mux_ts private debug: adding input codec=mp4v pid=68
[00000263] mux_ts private debug: new PCR PID is 68
[00000255] stream_out_duplicate private debug: - added for output 0
[00000249] macosx interface debug: input has changed, refreshing interface
[00000264] livedotcom demuxer debug: tk->rtpSource->hasBeenSynchronizedUsingRTCP()
[00000263] mux_ts private warning: packet with too strange dts (dts=1372879893469564,old=1126923265255160,pcr=1126923265255160)
[00000282] ffmpeg encoder warning: almost fed libavcodec with a frame in the past (current: 1126923265393920, last: 1372879893499564)
[00000282] ffmpeg encoder warning: almost fed libavcodec with a frame in the past (current: 1126923265427276, last: 1372879893499564)

Posted: **17 Sep 2005 05:36**

Okay, I tried the same with the mjpg stream from the camera and the same effect. Am I missing something in my command line?

Edit: Never mind, it does stream out UDP without dropping out.

Posted: **18 Sep 2005 04:43**

I figured it out. I had the FPS setting in the brackets for the GOP settings. Moved it outside of the brackets and now the stream doesn't drop off when transcoding the MPEG 4 stream.

Posted: **04 Oct 2005 23:06**

Where did you change the GOP setting? was it in the camera configuration or in the VLC config? Where?

Posted: **01 Feb 2006 23:44**

I read somewhere in the forum that VLC couldn't "inject" a stream into Darwin... but you seem to do it succesfully. Although i don't understand how you see the stream from Darwin without an sdp file...

Posted: **03 Mar 2006 12:11**

I have an IP camera which gives mpeg4 streams through RTSP. I used VLC to stream out the RTSP streams that we get from camera using the following:

vlc -vvv "rtsp://192.168.1.94:554/live" --sout #rtp{dst=192.168.1.19,port=1234,sdp=rtsp://192.168.1.19:1235/test.sdp} --ttl 12

Then I used IBM's MPEG4 player to capture the rtsp stream given by VLC. But I am not able to get streams. VLC shows a warning:

packetizer_mpeg4video warning: waiting for VOL

Please help....My ultimate aim is to get an MPEG4 player for my current Java project.

The VideoLAN Forums

RTP Stream Stops After 10 Seconds

RTP Stream Stops After 10 Seconds

Same Problem with an Axis 210

Re: RTP Stream Stops After 10 Seconds