[mythtv-users] getting video decode errors on ATSC subchannels

[Ian Evans]

On Thu, Feb 16, 2023 at 10:16 PM Gary Buhrmaster
<gary.buhrmaster at gmail.com> wrote:
>
> On Fri, Feb 17, 2023 at 1:10 AM Ian Evans <dheianevans at gmail.com> wrote:
>
> > Any idea what I should be looking at?
>
> WAG's follows:

That took me a second. LOL.

>
> What does mediainfo indicate about the recording?
> There are a few locations where the non-primary
> subchannel(s) is in a non-mpeg2 format[0] that one
> may need different decoders (or hardware) to
> decode.

Even though there was a 300 MB .ts file, mediainfo wasn't able to read it.

To clarify, this was just a test on a clean system, so completely new
installation, nothing to upgrade. When I was testing jellyfin, their
DVR was able to record them fine. But wow, did I miss the
functionality of MythTV for TV. So I nuked all that. Looking at the
logs, I do see a ton of lines about "Malformed NAL units" right after
the subchannel recording started:

Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I CoreContext
scheduler.cpp:717 (UpdateRecStatus) Updating status for Posse on
cardid [3] (Tuning => Recording)
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:4146 (TuningNewRecorder) TVRec[3]: rec->GetPathname():
'/media/disk2/15103_20230217032800.ts'
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:4179 (TuningNewRecorder) TVRec[3]: TuningNewRecorder -
CreateRecorder()
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:1648 (HandlePendingRecordings) TVRec[4]: ASK_RECORDING 4 0
0 0
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:1648 (HandlePendingRecordings) TVRec[1]: ASK_RECORDING 1 0
0 0
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:1648 (HandlePendingRecordings) TVRec[5]: ASK_RECORDING 5 0
0 0
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: I TVRecEvent
tv_rec.cpp:1648 (HandlePendingRecordings) TVRec[6]: ASK_RECORDING 6 0
0 0
Feb 16 22:27:31 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:35 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:37 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:43 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:46 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: I ProcessRequest
mainserver.cpp:1811 (HandleAnnounce) MainServer: MainServer::ANN
Monitor
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: I ProcessRequest
mainserver.cpp:1813 (HandleAnnounce) MainServer: adding:
bhmf(55fe0e3eaad0) as a client (events: 0)
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: I ProcessRequest
mainserver.cpp:1811 (HandleAnnounce) MainServer: MainServer::ANN
Monitor
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: I ProcessRequest
mainserver.cpp:1813 (HandleAnnounce) MainServer: adding:
bhmf(55fe0e3df4b0) as a client (events: 1)
Feb 16 22:27:47 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units
Feb 16 22:27:53 bhmf mythbackend: mythbackend[19718]: E
HDHRStreamHandler mpeg/AVCParser.cpp:410 (addBytes)
AVCParser::addbytes: malformed NAL units