DVB-T and DVB-T2: quick sanity check
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DVB-T and DVB-T2: quick sanity check
 
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I am finding the the GStreamer dvbsrc works fine with DVB-T but is
unable to cope with DVB-T2, at least using a playbin: tuning fails, the playbin internal pipeline breaks, and no tuning-fail signal is issued. I also note that one of the functions is definitely trying to use a ioctl that no longer exists in modern Linux, i.e. 4.5. The code claims to support the DVB API v5 as well as v3 but there are clearly problems. There are clearly (fromt he Git logs) folk still working on this code, does this imply someone is getting DVB-T2 to work? -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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On Mon, 2016-04-18 at 10:35 -0700, Reynaldo H. Verdejo Pinochet wrote:
> Hi Russel. I'm interested on DVB working across the set of > delivery systems we claim support for. Can you share some > more details about your DVB-T2 findings? Background is I am trying to decide whether to try and make the current dvbsrc plugin work properly with DVBv5 or to rewrite it depending on libdvbv5: currently dvbsrc source looks an awful lot like the libdvbv5 source. This particular problem can be characterized with this example from Me TV use. I try to tune to BBC NEWS HD, and I get the following. I think the fact that it tries to tune twice is understandable given the current state of the Me TV code. The tuner is a DVB-T2 one, dvbv5-zap has no problem tuning the device. 0:00:02.875841945 12453 0x1b2d600 FIXME dvbsrc gstdvbsrc.c:2032:gst_dvbsrc_is_valid_modulation: No delsys/modulation sanity checks implemented for this delivery system 0:00:02.891187218 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:02.892660382 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported … 10s of this message ever few millisconds … 0:00:12.888868728 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:12.890716122 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:12.890735666 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2300:gst_dvbsrc_tune_fe:<dvbsrc0> Unable to lock on signal at desired frequency 0:00:12.890752099 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2316:gst_dvbsrc_tune_fe:<dvbsrc0> Could not tune to desired frequency 0:00:12.891045607 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2576:gst_dvbsrc_tune:<dvbsrc0> Unable to tune frontend 0:00:12.891059010 12453 0x1b2d600 ERROR dvbsrc gstdvbsrc.c:1953:gst_dvbsrc_start:<dvbsrc0> Not able to lock on to the dvb channel 0:00:12.891112268 12453 0x1b2d600 WARN basesrc gstbasesrc.c:3721:gst_base_src_activate_push:<dvbsrc0> Failed to start in push mode 0:00:12.891126177 12453 0x1b2d600 WARN GST_PADS gstpad.c:1106:gst_pad_set_active:<dvbsrc0:src> Failed to activate pad 0:00:12.896698572 12453 0x1b2d600 FIXME dvbsrc gstdvbsrc.c:2032:gst_dvbsrc_is_valid_modulation: No delsys/modulation sanity checks implemented for this delivery system 0:00:12.896787915 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc1> Failed to get statistics from the device: Operation not supported 0:00:12.896818596 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc1> Failed to get statistics from the device: Operation not supported … 10s of this same error message every few milliseconds. … 0:00:22.898517392 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc1> Failed to get statistics from the device: Operation not supported 0:00:22.898617691 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2300:gst_dvbsrc_tune_fe:<dvbsrc1> Unable to lock on signal at desired frequency 0:00:22.898667859 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2316:gst_dvbsrc_tune_fe:<dvbsrc1> Could not tune to desired frequency 0:00:22.899034922 12453 0x1b2d600 WARN dvbsrc gstdvbsrc.c:2576:gst_dvbsrc_tune:<dvbsrc1> Unable to tune frontend 0:00:22.899082563 12453 0x1b2d600 ERROR dvbsrc gstdvbsrc.c:1953:gst_dvbsrc_start:<dvbsrc1> Not able to lock on to the dvb channel 0:00:22.899173636 12453 0x1b2d600 WARN basesrc gstbasesrc.c:3721:gst_base_src_activate_push:<dvbsrc1> Failed to start in push mode 0:00:22.899232840 12453 0x1b2d600 WARN GST_PADS gstpad.c:1106:gst_pad_set_active:<dvbsrc1:src> Failed to activate pad (me-tv:12453): GLib-GObject-CRITICAL **: g_object_get: assertion 'G_IS_OBJECT (object)' failed Segmentation fault (core dumped) -- Russel. ============================================================================= Dr Russel Winder t:+44 20 7585 2200 voip:sip: [hidden email] 41 Buckmaster Road m:+44 7770 465 077 xmpp:[hidden email] London SW11 1EN, UK w: www.russel.org.uk skype:russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Sorry, pressed "go" too soon…
The two main problems are: 1. There appears to be no recovery from the broken pipeline; and more importantly, 2. There is no tuning-failed signal issued. -- Russel. ============================================================================= Dr Russel Winder t:+44 20 7585 2200 voip:sip: [hidden email] 41 Buckmaster Road m:+44 7770 465 077 xmpp:[hidden email] London SW11 1EN, UK w: www.russel.org.uk skype:russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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In reply to this post by Stefan Ringel
On Wed, 2016-04-20 at 14:50 +0200, Stefan Ringel wrote:
> you must add the "delsys" property to the dvbsrc element in your > pipeline. Why isn't this picked up from the virtual channel configuration file? -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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In reply to this post by Reynaldo H. Verdejo Pinochet
On Wed, 2016-04-20 at 15:20 -0700, Reynaldo H. Verdejo Pinochet wrote:
> If you'd like to help getting this fix on dvbsrc, can you please > reproduce your failure with gst-launch and a recent checkout > from master and put your full command line alongside a > *dvb*:5 debug log for a failed run at bugzilla?. Will a use of gst-launch be equivalent to usage from a C++ program? I update and recompile my set of GStreamer libraries to master HEAD very regularly and certainly before doing anything with GStreamer, so I already good with being up to date :-) I'll put something together tomorrow (today, as yesterday, is a problematic day for doing stuff like this, long story :-( > For DVB-T2 you need to be properly setting: frequency, delsys, > bandwidth, code_rate_hp, code_rate_lp, modulation, > transmission_mode, guard_interval, hierarchy_information > and stream_id. Some of these parameters might have sane > defaults but please double check. All of these parameters should be picked up from the virtual channels file, so there should be no need to specify them manually. > The "Failed to get statistics" messages should be harmless, > although It'd be good to know what the failing ioctl is. Right > now we are assuming the ones we use (_READ_STATUS, > _READ_BER, etc) always work. > I'll delve some more tomorrow and over the weekend. Apologies for the delay in getting on to this. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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On Thu, 2016-04-21 at 10:15 +0200, Stefan Ringel wrote:
> > > Russel Winder <[hidden email]> hat am 21. April 2016 um 09:24 > > geschrieben: > > > > > > On Wed, 2016-04-20 at 15:20 -0700, Reynaldo H. Verdejo Pinochet > > wrote: > > […] > > > For DVB-T2 you need to be properly setting: frequency, delsys, > > > bandwidth, code_rate_hp, code_rate_lp, modulation, > > > transmission_mode, guard_interval, hierarchy_information > > > and stream_id. Some of these parameters might have sane > > > defaults but please double check. > > > > All of these parameters should be picked up from the virtual > > channels > > file, so there should be no need to specify them manually. > > > into what you picked up, external tool or other gstreamer element? The dvbsrc plugin receives the name of a channel. It reads the virtual channel file (or fails to work if it cannot) and looks up the channel and once found (or delivers a failure if it cannot) it has access to all the properties required, the ones Reynaldo listed. The virtual channels file has to be preprepared, yes, but that is what tools such as dvbv5-scan are there to do. Also there are functions in the libdvbv5 to do this, so that applications can do this for themselves. It is true though that Fedora Rawhide does not package dvbv5-scan and dvbv5-zap as far as I can tell even though Debian Sid does. I am not sure about other distributions. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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On Thu, 2016-04-21 at 10:46 -0700, Reynaldo H. Verdejo Pinochet wrote:
> […] > Not necessarily. Taking a look at a single gst-launch line might > be a lot easier than taking a look at (your) code. Additionally, > I want to make sure this is a GStreamer problem (I suspect > it is but I haven't confirmed). That works for me. The direct analogy is: gst-launch-1.0 playbin "uri=BBC%20NEWS%20HD" I put the output of running this at the end of the email. Running: gst-launch-1.0 playbin "uri=BBC%20NEWS" the SD version of the channel works fine. […] > This is not always the case, specially for the delivery systems we > have tested less. OK, I am probably missing something, but my assumption had been that the parameters delivered by the real channel scan should deliver all the parameters needed for the virtual channels and store them in the virtual channels file. The output for the pipeline above was: |> GST_DEBUG=3 gst-launch-1.0 playbin "uri=dvb://BBC%20NEWS%20HD" Setting pipeline to PAUSED ... 0:00:00.031611473 27348 0xe93a40 FIXME dvbsrc gstdvbsrc.c:2032:gst_dvbsrc_is_valid_modulation: No delsys/modulation sanity checks implemented for this delivery system 0:00:00.052235650 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:00.053825352 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:00.055450372 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:00.057575011 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported … lots more of the same … 0:00:10.045910280 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:10.047536304 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:10.049662198 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:10.051284881 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2094:gst_dvbsrc_output_frontend_stats:<dvbsrc0> Failed to get statistics from the device: Operation not supported 0:00:10.051301852 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2300:gst_dvbsrc_tune_fe:<dvbsrc0> Unable to lock on signal at desired frequency 0:00:10.051323389 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2316:gst_dvbsrc_tune_fe:<dvbsrc0> Could not tune to desired frequency 0:00:10.051369807 27348 0xe93a40 WARN dvbsrc gstdvbsrc.c:2576:gst_dvbsrc_tune:<dvbsrc0> Unable to tune frontend 0:00:10.051384363 27348 0xe93a40 ERROR dvbsrc gstdvbsrc.c:1953:gst_dvbsrc_start:<dvbsrc0> Not able to lock on to the dvb channel 0:00:10.051408339 27348 0xe93a40 WARN basesrc gstbasesrc.c:3721:gst_base_src_activate_push:<dvbsrc0> Failed to start in push mode 0:00:10.051443160 27348 0xe93a40 WARN GST_PADS gstpad.c:1106:gst_pad_set_active:<dvbsrc0:src> Failed to activate pad ERROR: Pipeline doesn't want to pause. Setting pipeline to NULL ... Freeing pipeline ... (gst-launch-1.0:27348): GLib-GObject-CRITICAL **: g_object_get: assertion 'G_IS_OBJECT (object)' failed Caught SIGSEGV -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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Hi,
Bug report duly made: https://bugzilla.gnome.org/show_bug.cgi?id=765731 On Mon, 2016-04-25 at 11:28 -0700, Reynaldo H. Verdejo Pinochet wrote: > Hi > > Thanks for the info. Can you get around opening a bug report > for -bad on "Failed DVB-T2 tunning with dvbsrc" please? Please > include. > > - GST_DEBUG=*:5 GST_DEBUG_NO_COLOR=1 gst-launch-1.0 > logs for your successful (SD) and failed use cases > - A copy of your channels.conf > - DVB adapter make / model / version info > > Please reply back with the bug # and I will take a look a closer look > at whats going on. > > Thank you. > > -- > Reynaldo > > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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Re: DVB-T and DVB-T2: quick sanity check
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On Fri, 2016-04-29 at 12:13 -0700, Reynaldo H. Verdejo Pinochet wrote:
> Hi > > Thanks Russel. I plan to take a look at this soon. Splendid. I'll be studying the code, and should be able to do experiments as required to get the current code working – even though my current aim is to offer replace it with code using libdvbv5. > I Will be following up on bugzilla. Seems like a sensible move, I'll take other thoughts about the problem there avoiding replicating in this forum. -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winder _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: DVB-T and DVB-T2: quick sanity check
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In reply to this post by Russel Winder
After some experimenting and general fiddling, Reynaldo has committed
into the bad plugins, a solution to the problem of playing DVB-T2. There are still issues, and there is ongoing work, but I thought I'd report back the success. On Sun, 2016-04-17 at 08:46 +0100, Russel Winder wrote: > I am finding the the GStreamer dvbsrc works fine with DVB-T but is > unable to cope with DVB-T2, at least using a playbin: tuning fails, > the > playbin internal pipeline breaks, and no tuning-fail signal is > issued. > > […] > -- Russel. ============================================================================= Dr Russel Winder t: +44 20 7585 2200 voip: sip:[hidden email] 41 Buckmaster Road m: +44 7770 465 077 xmpp: [hidden email] London SW11 1EN, UK w: www.russel.org.uk skype: russel_winde _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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