[Gnash-dev] ffmpeg: premature end of live streams

[Udo Giacomozzi]

I have a simple Gnash application that shows a live video stream from
a IP camera (MJPEG codec).

After about 9 minutes the video stops to update itself and keeps
showing the last frame received.

Verbose output says:

$ GNASH_DEFAULT_VCODEC=mjpeg ./gnash.sh -v test/mjpeg-test4.swf -r 1 -v
...
22257:1] 14:45:45 DEBUG: Framebuffer pixel format is BGRA32 (little-endian host)
22257:1] 14:45:45 DEBUG: Initialized AGG buffer <0xb52c7008>, 8253440 bytes, 
800x480, rowsize is 4096 bytes
...
22257:1] 14:45:45 DEBUG: Loading native class MovieClip
22257:1] 14:45:45 DEBUG: Loading native class Error
22257:1] 14:45:45 DEBUG: Loading native class NetConnection
22257:1] 14:45:45 DEBUG: gnash::as_value 
gnash::<unnamed>::netconnection_new(const gnash::fn_call&) enter
22257:1] 14:45:45 DEBUG: Loading native class NetStream
22257:1] 14:45:45 SECURITY: Connecting to movie: 
http://10.1.1.150/control/faststream.jpg?stream=full&fps=0
22257:1] 14:45:45 SECURITY: Checking security of URL 
'http://10.1.1.150/control/faststream.jpg?stream=full&fps=0'
22257:1] 14:45:45 SECURITY: Load from host 10.1.1.150 granted (default)
22257:1] 14:45:45 DEBUG: CurlStreamFile 0x98ce880 created
22257:1] 14:45:45 DEBUG: Parsing FFMPEG media file: format:mjpeg; nstreams:1
22257:1] 14:45:45 DEBUG:   Using stream 0 for video: codec id 8
22257:1] 14:45:45 ERROR: Duration of video stream unknown
22257:1] 14:45:45 DEBUG: Starting MediaParser thread
22257:1] 14:45:45 DEBUG: Global instance list grew to 2 entries
22257:1] 14:45:45 DEBUG: Starting virtual clock
22257:1] 14:45:45 DEBUG: VideoDecoder: initialized FFMPEG codec mjpeg (8)
22257:1] 14:45:45 DEBUG: NetStream_as::initVideoDecoder: hot-plugging video 
consumer

22257:3] 14:54:12 ERROR: CURL: Failed writing received data to disk/application
22257:3] 14:54:12 ERROR: MediaParserFfmpeg::parseNextFrame: Problems parsing 
next frame (av_read_frame returned -5). We'll consider the stream fully parsed.
22257:1] 14:54:12 ERROR: Decoding of a video frame failed
22257:1] 14:54:12 ERROR: Error decoding encoded video frame in NetStream input
22257:1] 14:54:12 ERROR: nextVideoFrameTimestamp returned true (254040), but 
decodeNextVideoFrame returned null, I don't think this should ever happen


Relevant ActionScript (AS2, SWF6) is quite simple:
---------------8<-----------------------------------------------------
url = "http://10.1.1.150/control/faststream.jpg?stream=full&fps=0";;

var connection_nc:NetConnection = new NetConnection();
connection_nc.connect(null);
var stream_ns:NetStream = new NetStream(connection_nc);
stream_ns.setBufferTime(0);   // reduce latency to minimum
video.attachVideo(stream_ns);

stream_ns.play(url);
---------------8<-----------------------------------------------------


Obviously CURL has problems forwarding the data to the decoder. Any
clue why this happens? I'm not that familiar with the video stuff in
Gnash...

Gnash is configured for FFMPEG + AGG. System is Debian 5 with about
110 MB free RAM while Gnash is _running_.


Any ideas?

Udo