Further joys of exploring a Pi 4B with a TV hat on have proved frustrating

I ported my TVheadend server configuration to it and that worked fairly
OK except when I popped a TV Hat on it that was allegedly capable of
doing HD TV.

Well out of the box it didn't, but web searches eventually got me to the
stage where the HD channels were recognised, but they show no EPG data,
and when streaming, there is no sound.

It does show 139% CPU usage too, in 'top' but seems to play ok

The suggestion is that the transcoding from HD LATM to web-vorbis-vp8
protocol (the only one that has ever worked on the software: the others
either don't work or crash the server with what look like out of bound
memory accesses) needs something more than the current issue.

Anyone have any klews on this?

--
For in reason, all government without the consent of the governed is the
very definition of slavery.

Jonathan Swift

The Natural Philosopher wrote:

> when streaming, there is no sound.

streaming to local HDMI display, or over LAN to VLC?

if the latter, it's not unknown for it to pick the wrong audio track,
how many different ones do you see?

On 25/10/2023 19:00, Andy Burns wrote:
> The Natural Philosopher wrote:
>
>> when streaming, there is no sound.
>
> streaming to local HDMI display, or over LAN to VLC?
>
Neither. Over lan to browser via custom server

> if the latter, it's not unknown for it to pick the wrong audio track,
> how many different ones do you see?
>
I'll try and see. VLC is happy to play a *recorded* HD though.

Hmm. celluloid is happy to play it but the profile is 'pass' which does
no transcoding.
I'm trying to get it to play in a browser...browsers don't understand
raw TV streams

So it needs transcoding

--
“I know that most men, including those at ease with problems of the
greatest complexity, can seldom accept even the simplest and most
obvious truth if it be such as would oblige them to admit the falsity of
conclusions which they have delighted in explaining to colleagues, which
they have proudly taught to others, and which they have woven, thread by
thread, into the fabric of their lives.”

― Leo Tolstoy

On 25/10/2023 20:14, The Natural Philosopher wrote:

> On 25/10/2023 19:00, Andy Burns wrote:
>> The Natural Philosopher wrote:
>>
>>> when streaming, there is no sound.
>>
>> streaming to local HDMI display, or over LAN to VLC?
>
> Neither. Over lan to browser via custom server

What about the "Live TV Player" in a browser from the TVH GUI?
I think mine does live transcoding (certainly more buffering that using
VLC) it can still get the audio track wrong ... just tried and I was
getting the audio description channel instead of "normal" channel.

On 25/10/2023 20:14, The Natural Philosopher wrote:
> On 25/10/2023 19:00, Andy Burns wrote:
>> The Natural Philosopher wrote:
>>
>>> when streaming, there is no sound.
>>
>> streaming to local HDMI display, or over LAN to VLC?
>>
> Neither. Over lan to browser via custom server
>
>> if the latter, it's not unknown for it to pick the wrong audio track,
>> how many different ones do you see?
>>
> I'll try and see. VLC is happy to play a *recorded* HD though.
>
> Hmm. celluloid is happy to play it but the profile is 'pass' which does
> no transcoding.
> I'm trying to get it to play in a browser...browsers don't understand
> raw TV streams
>
> So it needs transcoding
>
>
Here are the logs

Oct 25 20:28:38 Coriolanus tvheadend[5840]: subscription: 0003: "HTTP"
subscribing on channel "5SELECT", weight: 100, adapter: "Sony CXD2880 #0
: DVB-T #0", network: "DVB-T Network", mux: "682MHz", service:
"5SELECT", profile="webtv-vp8-vorbis-webm", hostname="192.168.0.100",
username="media"
Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001: 01:H264:
==> Using profile webtv-vp8
Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001:
02:AAC-LATM: ==> Using profile webtv-vorbis

^^^ that doesn't seem to work

Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001:
03:AAC-LATM: ==> Filtered out
Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001: 04:DVBSUB:
==> Filtered out
Oct 25 20:28:41 Coriolanus tvheadend[5840]: libav: AVCodecContext: v1.12.0
Oct 25 20:28:54 Coriolanus tvheadend[5840]: subscription: 0003: "HTTP"
unsubscribing from "5SELECT", hostname="192.168.0.100", username="media"

Oct 25 20:28:55 Coriolanus tvheadend[5840]: mpegts: 682MHz in DVB-T
Network - tuning on Sony CXD2880 #0 : DVB-T #0
Oct 25 20:28:55 Coriolanus tvheadend[5840]: subscription: 0005:
"epggrab" subscribing to mux "682MHz", weight: 4, adapter: "Sony CXD2880
#0 : DVB-T #0", network: "DVB-T Network", service: "Raw PID Subscription"

Oct 25 20:30:22 Coriolanus tvheadend[5840]: mpegts: 538MHz in DVB-T
Network - tuning on Sony CXD2880 #0 : DVB-T #0
Oct 25 20:30:22 Coriolanus tvheadend[5840]: subscription: 0005:
"epggrab" unsubscribing
....

Oct 25 20:30:22 Coriolanus tvheadend[5840]: subscription: 0006: "HTTP"
subscribing on channel "5USA", weight: 100, adapter: "Sony CXD2880 #0 :
DVB-T #0", network: "DVB-T Network", mux: "538MHz", service: "5USA",
profile="webtv-vp8-vorbis-webm", hostname="192.168.0.100", username="media"
Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
01:MPEG2VIDEO: ==> Using profile webtv-vp8
Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
02:MPEG2AUDIO: ==> Using profile webtv-vorbis
^^^^^^^^^
That DOES work

Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
03:MPEG2AUDIO: ==> Filtered out
Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002: 04:DVBSUB:
==> Filtered out
Oct 25 20:30:26 Coriolanus tvheadend[5840]: libav: AVCodecContext: v1.12.0

I can get neither sound NOR EPG out of the 682MHZ Mux.

TVheadend can play channels in the MUX in passthru mode, but not when
transcoding
TVheadend has never managed to get EPG data from that MUX, ever.

--
“The ultimate result of shielding men from the effects of folly is to
fill the world with fools.”

Herbert Spencer

On 25/10/2023 20:28, Andy Burns wrote:
> On 25/10/2023 20:14, The Natural Philosopher wrote:
>
>> On 25/10/2023 19:00, Andy Burns wrote:
>>> The Natural Philosopher wrote:
>>>
>>>> when streaming, there is no sound.
>>>
>>> streaming to local HDMI display, or over LAN to VLC?
>>
>> Neither. Over lan to browser via custom server
>
> What about the "Live TV Player" in a browser from the TVH GUI?

Works, but that is passthru and it invokes 'celluloid'

> I think mine does live transcoding (certainly more buffering that using
> VLC) it can still get the audio track wrong ... just tried and I was
> getting the audio description channel instead of "normal" channel.
>

I've not had that at all. The logs show the correct audio channel is
being transcoded, but no sound emerges :-(

--
“I know that most men, including those at ease with problems of the
greatest complexity, can seldom accept even the simplest and most
obvious truth if it be such as would oblige them to admit the falsity of
conclusions which they have delighted in explaining to colleagues, which
they have proudly taught to others, and which they have woven, thread by
thread, into the fabric of their lives.”

― Leo Tolstoy

The Natural Philosopher wrote:([[br) />

> Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001:
> 03:AAC-LATM: ==> Filtered out
>
> Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
> 02:MPEG2AUDIO: ==> Using profile webtv-vorbis
>
> Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
> 03:MPEG2AUDIO: ==> Filtered out
I have a combined DVB-T2/S2 tuner, but terrestrial is disabled due to
aerial issues

2023-10-26 08:52:41.900 mpegts: 11024H in Astra28E2 - tuning on DVB-S #0

2023-10-26 08:52:42.235 subscription: 7F74: "HTTP" subscribing on
channel "BBC NEWS HD", weight: 100, adapter: "DVB-S #0", network:
"Astra28E2", mux: "11024H", provider: "BSkyB", service: "BBC NEWS HD",
profile="webtv-vp8-vorbis-webm", hostname="fe80::908c:6162:b5f8:828a",
client="Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101
Firefox/119.0"

2023-10-26 08:52:44.102 transcode: 0003: 01:H264: ==> Using profile
webtv-vp8

2023-10-26 08:52:44.102 transcode: 0003: 04:AC3: ==> Using profile
webtv-vorbis

2023-10-26 08:52:44.102 transcode: 0003: 02:DVBSUB: ==> Filtered out

2023-10-26 08:52:44.103 transcode: 0003: 05:TEXTSUB: ==> Filtered out

Seems your TVH is unsure about AAC-LATM and MPEG2AUDIO audio, mine gets
AC3 and is happy with it?

On 26/10/2023 09:04, Andy Burns wrote:
> The Natural Philosopher wrote:([[br) />
>
>> Oct 25 20:28:40 Coriolanus tvheadend[5840]: transcode: 0001:
>> 03:AAC-LATM: ==> Filtered out
>>
>> Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
>> 02:MPEG2AUDIO: ==> Using profile webtv-vorbis
>>
>> Oct 25 20:30:23 Coriolanus tvheadend[5840]: transcode: 0002:
>> 03:MPEG2AUDIO: ==> Filtered out
> I have a combined DVB-T2/S2 tuner, but terrestrial is disabled due to
> aerial issues
>
> 2023-10-26 08:52:41.900 mpegts: 11024H in Astra28E2 - tuning on DVB-S #0
>
> 2023-10-26 08:52:42.235 subscription: 7F74: "HTTP" subscribing on
> channel "BBC NEWS HD", weight: 100, adapter: "DVB-S #0", network:
> "Astra28E2", mux: "11024H", provider: "BSkyB", service: "BBC NEWS HD",
> profile="webtv-vp8-vorbis-webm", hostname="fe80::908c:6162:b5f8:828a",
> client="Mozilla/5.0 (Windows NT 10.0; rv:109.0) Gecko/20100101
> Firefox/119.0"
>
> 2023-10-26 08:52:44.102 transcode: 0003: 01:H264: ==> Using profile
> webtv-vp8
>
> 2023-10-26 08:52:44.102 transcode: 0003: 04:AC3: ==> Using profile
> webtv-vorbis
>
> 2023-10-26 08:52:44.102 transcode: 0003: 02:DVBSUB: ==> Filtered out
>
> 2023-10-26 08:52:44.103 transcode: 0003: 05:TEXTSUB: ==> Filtered out
>
>
>
> Seems your TVH is unsure about AAC-LATM and MPEG2AUDIO audio, mine gets
> AC3 and is happy with it?
>

Its AAC-LATM that seems to be the issue. And the lack of EPG for the
channels.

Well I can do HD TV in other ways if I really need it by using (one of
the) the TV headend native interfaces.

One works, the other has no sound...

--
"If you don’t read the news paper, you are un-informed. If you read the
news paper, you are mis-informed."

Mark Twain