TVHeadend build/install on Lubuntu 20.04-64bit with iGPU 8+ transcoding

Alin Gherghescu · 2022-12-03T02:38:34+00:00

This tutorial is intended for beginners interested in compiling tvheadend with HW GPU transcoding (using iGPU form Intel gen 8+). It is a little messy how I...

ukn_unknown

apollo I don't want to put you in trouble and I don't want to create any kind of problem for you, if it's not possible to go ahead we can stop here...

Is not about put me in trouble ... but we need to come up with a story that make sense for the product. If this parameter (ID) has to be faked ... we need to use a checkbox that by default is OFF ("WMC workaround") that you can check to perform the change.
Will become a little harder to implement ... but don't worry about this part. For now let's understand what we need to add to make it work. After that we will discuss how we integrate that into TVH in a harmonious way.
If I understand right you are using the setup from: https://kevinchalet.com/2023/07/05/connecting-windows-media-center-to-tvheadend-with-hdhrproxyiptv-an-alternative-to-dvblink/
Tvheadend + HDHomeRun BDA + HDHRProxyIPTV
Please confirm.
What I am worried is that MediaInfo is only showing some information ... not all the containers information - so the comparison pass<-->vaapi will require a software that will show all fields. Let me know if you can find that software 🙁 .

ukn_unknown

apollo
I fixed also mpegts_service_id --> please pull again and recompile. Please check with MediaInfo ... should have all the information exposed by MediaInfo.

apollo

Yes, I am trying to use the configuration you linked. Try this program... Thank
TSAnalyser

ukn_unknown

apollo this looks very professional ... I will try to use it 🙂. Thank you for info ... is really helpful for debugging.

ukn_unknown

apollo First sample you provided was from a DVB-T --> and video was H264; so I think it should work with pass profile (same setup like in the link above). You can use that to ensure the chain of tools is working before transitioning to DVB-S + vaapi profile.

apollo

Hi,
sorry, maybe I'm confusing you or I can't follow you with google translation...🙂
If you're talking about recorded files I took as an example the rai 501 channel that broadcasts in dvb-t2 hevc.
In Kevin's configuration the profile pass with dvb-t h264 channels works very well.
I'm not using dvb-s...
Thanks

ukn_unknown

apollo I understand .. was my misunderstanding. Now is clear. Is actually DVB-T2, not DVB-S.
When you say "rai 501 channel is not working with vaapi" ... can you try to understand where does it break? meaning the software HDHRProxyIPTV that is connecting to tvheadend is able to connect? I see it has some logging for errors in some error conditions. Or the issue is from WPC when is connecting to HDHRProxyIPTV? The error is during channel scan? or is when you try to play a particular channel? I know that is sounds like 'shooting in the dark' ... but frankly I don't know how to debug this without having access to a system with WPC. I will try to use tsanalyser to make transcoding_mpegts container as close as possible to pass_mpegts.

Can you post a print screen on the settings used in profile 'pass' that works with WPC?
Please confirm by using command ffmpeg -i - -f mpegts -mpegts_transport_stream_id 0x0006 -mpegts_service_id 0x0601 -metadata service_provider="SMR6" -metadata service_name="TF1" -c:a copy -c:v [codec video preferito] -hide_banner -loglevel panic pipe:1 you can add one channel (because settings are hard coded).

apollo

Hi,
from what I understand hdhomerun behaves like a real dvb-t tuner and in transcoding the metadata that complete the mpegts flow are lost...
In my opinion if you can make the transcoding_mpegts container as similar as possible to pass_mpegts you are on the right track.
Thanks

apollo

In the configuration of the link above, an application is used that creates a profile in tvh for each tv channel called wmc:pass, injects the channels into the wmc database and creates a mappinglist for hdhrproxy.
When everything is configured, you can edit the list, as shown in the image, and change the profile.

ukn_unknown

apollo frankly I don't understand why the software is creating so many identical pass-s. I wander if the channel added at the end of the profile name is not an important info.
Can you rename the wmc-pass:501 (made by the application) into wmc-pass:501_2 ; and rename h264_vaapi into wmc-pass:501 . Also change the INI file to what application has initially made ( ... 501?profile=wmc-pass:501).
I want to ensure that name of the profile is not something that needs to remain the same (even if you change the pass with transcoding in tvheadend).
It is really strange ... because with the settings above pass (from your picture) will override service ID to 1 ... so all programs will have ID = 1 🙁 . How is working !?
Please answer my question # 2 above.

apollo

Hi,
I haven't tried ffmpeg...
We're figuring out how it all works together.
Below I'll paste the text copied from the site...
Thanks

By default, when Tvheadend extracts the elementary streams associated to a single channel – called Single Program Transport Stream (or SPTS) – from the Multiple Program Transport Stream (or MPTS) returned by the physical tuner, it doesn't preserve the MPEG network ID/transport stream ID/service ID of the original stream and arbitrarily sets all these values to 1.

Unfortunately, when multiple channels share the same exact DVB information, Windows Media Center ends up merging them automatically at some point (a process typically performed by the mcGlidHost executable). While it is possible to disable this mechanism, using the same DVB information has other side-effects like forcing a bogus channel change when recording a program on another channel while already watching live TV.

To prevent that, the tool automatically asks Tvheadend to create stream profiles that enforce a unique service ID per channel and uses this identifier when injecting the channel into the WMC database to produce a unique DvbTuningInfo instance that won't be shared by multiple channels.

ukn_unknown

apollo DMC posted a very detailed way to dump a mux (mux is the entity that keep one MPTS). https://docs.tvheadend.org/documentation/creating-a-mux-dump ; If you could dump the mux DVB-T2 with channel 501 for about 1-2 minutes ... would help me to investigate all fields (with TSAnalyser) present in your stream ... and try to preserve as many I can. Take note that the file will be around 250M / min. Thank you.

it doesn't preserve the MPEG network ID/transport stream ID/service ID of the original stream and arbitrarily sets all these values to 1.

This is true only if you keep the default settings ... if you want to preserve thins info you have to use the following settings:

You can see on the tooltip --> Zero means no rewrite. I think will preserve also the rest of the settings listed (beside Service ID).
You can do a VLC record for profile pass with above settings and you will see the difference (relative to the original pass profiles with Rewrite Service ID = 1).

apollo

I recorded channel 501 dvb-t2 for you, I'll check the other things as soon as possible...
Thanks again for your availability

[https://drive.google.com/drive/folders/1blISphVtiNjYZ1Ix2btnKUSWmQaufMFj?usp=sharing]

ukn_unknown

apollo I updated the branch with latest finding ... frankly I am running out of ideas. I cannot transfer al IDs to be identical, but I was able to populate most of them with original numbers. You can see here a comparison side by side:

Teletext cannot be integrated ... so is stripped down with trancoding.

apollo

Hi,
sorry, I'm having some problems lately...
I tried your new modification, with wmc the transcoding starts but doesn't display anything, there's no audio or video
I fully understand that you're trying in the dark, so if you don't have any other ideas, let's stop here.
If you want, I've attached the same file/channel transcoded with the new branch to compare it with yours...
Thanks

[https://drive.google.com/drive/folders/1blISphVtiNjYZ1Ix2btnKUSWmQaufMFj?usp=sharing]

ukn_unknown

apollo you can try to replace h264 with mpeg2 (for video) and/or AAC with mp2 (for audio). I think you are close ... is only a matter of compatibility. Maybe change settings for h264 and/or AAC.
Edit: Try to change the h264 Profile (to all 3 options) and Level (try higher or lower). As for AAC try to change Profile.

apollo

Hi unknown,
the text below has been copied from the usual link...
What you think?
is it possible to make a last attempt...?
Thanks

It's worth noting that each channel in WMC must have a unique MPEG service ID, so you basically need one streaming profile per channel with a specific service ID attached in Tvheadend for things to work correctly

ukn_unknown

apollo you already have this feature (different service ID for each program) in your build. You can use VLC and TS Analyser to confirm each channel will have a different service ID. If transcoding starts it means you already passed the 'stream ID problem'. Try to add only one channel to WMC ... that should rule out the problem of conflicting 2 channel with the same service ID.
Try to replace the H264 with MPEG2 and AAC with mp2 ... maybe the problem was with stream video/audio.
Don't understand me wrong ... I would help you, but you have to tell me what you need 🙁 . What you are asking above is already implemented.

apollo

I don't know why I was convinced it was random, sorry I got confused...:🙂🙂
Thanks

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