HVR 1800 ATSC recordings - audio track?

[sub]

I haven't looked at the files yet, but if they're the same channel but from different sources (ATSC vs QAM) then they could certainly have different audio streams. If they were both from QAM, or both from ATSC, then the HVR recording would be identical to your HDHR.

[mulletback]

It's likely that your QAM source (cable?) is remixing the stream to eliminate the second track.

[ccihon]

Here's the log - initiated playback of problem file at about line 400 - and later in this log played the other file. This was on server machine rather than my client normally used, but both exhibit the AC3 track selection issue.

[ccihon]

It's likely that your QAM source (cable?) is remixing the stream to eliminate the second track.

Just to clarify, I have used the Dual to tune via Antenna ATSC this channel, and playback was fine - but it would be an issue to switch to that setup now. So rather than an ATSC vs QAM issue, its in my opinion a HVR vs HDHR recording issue.

[whurlston]

Here's the log - initiated playback of problem file at about line 400 - and later in this log played the other file. This was on server machine rather than my client normally used, but both exhibit the AC3 track selection issue.

Your "problem" file seems to have dual AC3 tracks. Even though it may be a stereo stream, it is muxed as an AC3 stream:

Code:

<ServiceInformation>
  <TSID>1</TSID>
  <Service>
    <ServiceID>1</ServiceID>
    <PMT_PID>48</PMT_PID>
    <Streams>
      <Stream>
        <PID>49</PID>
        <StreamType>2</StreamType>
        <unparsed_descriptor>0x6</unparsed_descriptor>
        <unparsed_descriptor>0x86</unparsed_descriptor>
      </Stream>
      <Stream>
        <PID>52</PID>
        <StreamType>129</StreamType>
        <unparsed_descriptor>0x5</unparsed_descriptor>
        <unparsed_descriptor>0xA3</unparsed_descriptor>
        <unparsed_descriptor>[B][color=#FF0000]0x81[/color][/B]</unparsed_descriptor>
        <Language>eng</Language>
        <AudioType>0</AudioType>
      </Stream>
      <Stream>
        <PID>53</PID>
        <StreamType>129</StreamType>
        <unparsed_descriptor>0x5</unparsed_descriptor>
        <unparsed_descriptor>0xA3</unparsed_descriptor>
        <unparsed_descriptor>[B][color=#FF0000]0x81[/color][/B]</unparsed_descriptor>
        <Language>eng</Language>
        <AudioType>0</AudioType>
      </Stream>
    </Streams>
  </Service>
</ServiceInformation>

I suspect that your cable provider is eliminating one as mentioned earlier.

[sub]

Just to clarify, I have used the Dual to tune via Antenna ATSC this channel, and playback was fine - but it would be an issue to switch to that setup now. So rather than an ATSC vs QAM issue, its in my opinion a HVR vs HDHR recording issue.

I'm sure that wont be the case. Can you supply short sample recordings from the same source? I'll be able to check what is different about the two streams.

[ccihon]

Here is an archived sample of same program, same channel as the previous samples, but this was when I was using the Dual to record ATSC - it does appear to have two tracks - but this file plays back without issue. Just want the Hauppauge recording to act the same way!


(edit - it appears to be an issue also - that is, NPVR playback seems to always pick the wrong AC3 track of the two included - what to do?)

https://dl.dropboxusercontent.com/u/1680...-chunk.zip

[sub]

Here is an archived sample of same program, same channel as the previous samples, but this was when I was using the Dual to record ATSC

As far as I can tell, they're not from the same source - they have different program numbers, different audio/video pids, and different streams.

I think if you connected them both up as ATSC now, and recorded a segment of the same show, you'd get the same results from both devices.

[ccihon]

not sure about same source - what I am saying is the latest file posted is an HDHR ATSC recording of wbnstv, and the previous two are: an ATSC HVR1800 recording of that channel, along with a QAM recording from the cable version of wbnstv. I'll accept that the ATSC recording from both devices from the same broadcast channel will contain the same number and type of streams.....but here is the issue - I'm moving away from QAM as it will soon go away as clear QAM - so my issue is best expressed:


How do I have NPVR reliably start and continue to play the correct (6-channel) audio stream? For me it will not. in fact, the default seems to be "AC2 Track 2 (eng)" not Track 1

[sub]

Try this patch - there is a chance it's not going to run on your machine, due to me changing compilers since the last release, so backup your original file so you can go back.