epg-scan doesn't resume after a channel playback

[harshabm]

Hi,
I see that the epg-scan stops when there is a request for channel playback.But it never resumes later.
Please correct me if i am wrong...

setup details:
1. i have installed gnome-dvb-daemon 0.1.21 on ubuntu 10.01 with gst-rtsp-server-0.10.
2. i have registered a device group with 2 free devices (USB DVBT reciever with 2 adaptors ) and a channels.conf with some channels.
3. i have setup the epg frequency/duration to 1 min in the settings.ini.

procedure:
1. i start the gnome-dvb-dameon in debug mode.i see that the ep-scan is happening.
now i send a request to play a channel using gst-launch rtspsrc command
     ( gst-launch-0.10 rtspsrc location=rtsp://my-desktop:8554/1/16418/VOX ! fakesink)
2. immediately the epg-scan is stopped.
3. Since there is no telecast for the channel the gst-rtsp server fails to prepare/preroll the gst pipeline and hence closes the connection. so far good.this is expected.
4. Then i see that the epg scan never resumes.

i digged a bit into the daemon code.i observed the following in MediaFactory.vala-
The epg scan never resumes because the unprepare is never called on the DVBMedia which actually is responsible for resuming the scan.

here is the log

Server:
gnome-dvb-daemon -d
** (gnome-dvb-daemon:11752): DEBUG: Main.vala:131: Has dvbsrc >= 0.10.13: true
** (gnome-dvb-daemon:11752): DEBUG: Main.vala:131: Has dvbbasebin >= 0.10.13: true
** (gnome-dvb-daemon:11752): DEBUG: Main.vala:131: Has mpegtsparse >= 0.10.13: true
** (gnome-dvb-daemon:11752): DEBUG: Main.vala:131: Has rtpmp2tpay >= 0.10.14: true
** Message: Main.vala:59: Creating new Manager D-Bus service
** Message: Main.vala:80: Creating new RecordingsStore D-Bus service
** (gnome-dvb-daemon:11752): DEBUG: DeviceGroup.vala:373: Creating new ChannelList D-Bus service for group 1
** (gnome-dvb-daemon:11752): DEBUG: DeviceGroup.vala:286: Creating new Recorder D-Bus service for group 1
** Message: Main.vala:161: Restoring 1 device groups
** (gnome-dvb-daemon:11752): DEBUG: Manager.vala:435: Restoring group 1
** (gnome-dvb-daemon:11752): DEBUG: Manager.vala:397: Adding device group 1 with 2 devices
** (gnome-dvb-daemon:11752): DEBUG: EPGScanner.vala:140: Starting EPG scan for group 1 (0)
** Message: Manager.vala:448: Restoring timers of device group 1
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:106: Finished restoring EPG events for channel 16405
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:106: Finished restoring EPG events for channel 16406
** Message: Server.vala:26: Starting RTSP server
** Message: listening on port 8554
** Message: Services.vala:291: Creating new Rygel MediaServer D-Bus service
** (gnome-dvb-daemon:11752): DEBUG: Services.vala:59: Creating container for device group 1
** (gnome-dvb-daemon:11752): DEBUG: Services.vala:166: Creating container for channel 16405
** (gnome-dvb-daemon:11752): DEBUG: Services.vala:166: Creating container for channel 16406
** (gnome-dvb-daemon:11752): DEBUG: Services.vala:166: Creating container for channel 16418
** (gnome-dvb-daemon:11752): DEBUG: Services.vala:166: Creating container for channel 16411

** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:133: Removing expired events of channel <b>RTL</b> Television (16405)
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:133: Removing expired events of channel RTL2 (16406)
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:133: Removing expired events of channel VOX (16418)
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:133: Removing expired events of channel <b>S</b>uper<b> RTL</b> (16411)

** (gnome-dvb-daemon:11752): DEBUG: EPGScanner.vala:203: Finished EPG scan for group 1
** (gnome-dvb-daemon:11752): DEBUG: EPGScanner.vala:140: Starting EPG scan for group 1 (0)
** (gnome-dvb-daemon:11752): DEBUG: Schedule.vala:133: Removing expired events of channel <b>RTL</b> Television (16405)

** Message: added new client 0x90842f0 ip 127.0.1.1:37580
** Message: attaching to context 0x9024dc0
RTSP request message 0x9079858
 request line:
   method: 'OPTIONS'
   uri: 'rtsp://my-desktop:8554/1/16418/VOX'
   version: '1.0'
 headers:
   key: 'CSeq', value: '1'
   key: 'Date', value: 'Mon, 25 Oct 2010 13:52:36 GMT'
 body:
** Message: client 0x90842f0: received a request
RTSP response message 0xbf96dea8
 status line:
   code: '200'
   reason: 'OK'
   version: '1.0'
 headers:
   key: 'CSeq', value: '1'
   key: 'Public', value: 'OPTIONS, DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN'
   key: 'Server', value: 'GStreamer RTSP server'
 body: length 0
RTSP request message 0x9079858
 request line:
   method: 'DESCRIBE'
   uri: 'rtsp://my-desktop:8554/1/16418/VOX'
   version: '1.0'
 headers:
   key: 'CSeq', value: '2'
   key: 'Accept', value: 'application/sdp'
   key: 'Date', value: 'Mon, 25 Oct 2010 13:52:36 GMT'
 body:
** Message: client 0x90842f0: received a request
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:563: Watching channel VOX (16418)
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:580: Creating new PlayerThread: true

** (gnome-dvb-daemon:11752): DEBUG: EPGScanner.vala:78: Stopping EPG scan for group 1 (0)

** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:115: Creating new pipeline
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:454: Element tee0 (0x9074970) added to pipeline
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:454: Element bin0 (0x9058710) added to pipeline
** (gnome-dvb-daemon:11752): DEBUG: MediaFactory.vala:76: Retrieving sink bin with payloader
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:261: Searching for sink pay0 (0x9094100) of channel 16418
** (gnome-dvb-daemon:11752): DEBUG: ChannelFactory.vala:280: Found sink
** Message: found stream 0 with payloader 0x9094100
** Message: constructed media 0x8f33110 for url /1/16418/VOX
** Message: preparing media 0x8f33110
** Message: enter mainloop

** (gnome-dvb-daemon:11752): WARNING **: failed to preroll pipeline
RTSP response message 0xbf96dd04
 status line:
   code: '503'
   reason: 'Service Unavailable'
   version: '1.0'
 headers:
   key: 'CSeq', value: '2'
   key: 'Server', value: 'GStreamer RTSP server'
 body: length 0
** Message: client 0x90842f0: connection closed
** Message: finalize client 0x90842f0

CLIENT >
>gst-launch-0.10 rtspsrc location=rtsp://my-desktop:8554/1/16418/VOX ! fakesink
>Setting pipeline to PAUSED ...
>ERROR: Pipeline doesn't want to pause.
>ERROR: from element /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0: Could not read from resource.
>Additional debug info:
>gstrtspsrc.c(3847): gst_rtspsrc_try_send (): /GstPipeline:pipeline0/GstRTSPSrc:rtspsrc0:
>Could not receive message. (Timeout while waiting for server response)
>Setting pipeline to NULL ...
>Freeing pipeline ...

[Sebastian Pölsterl (sebp)]

You are right, we have to take care that the epg scanner is started again after tuning a channel failed. Will look into this.

[Sebastian Pölsterl (sebp)]

Looking at the code of latest gst-rtsp-server, it actually does call unprepare, could you please test with the latest version and tell me if the problem still persists.

[Launchpad Janitor (janitor)]

[Expired for GNOME DVB Daemon because there has been no activity for 60 days.]