HVR1600 Audio playback on SD channels

[JavaWiz]

I've scanned thru the forums, but have not found a reasonable explanation or solution for what I am experiencing which is the inability to get audio on SD recordings off the QAM tuner.

I have a HVR1600 that I have configured to use analog via comcast STB, and QAM over the comcast feed for both SD and HD channels. Several of the analog channels are being broadcast as QAM also (SD), so some channels are defined on both tuners.

I can watch LiveTV on both the Analog and QAM tuner just fine, both video and audio work perfectly.

If I record a SD channel (ex. 5 NBC) via the QAM tuner, I get video, but no audio.

If I record the HD version of that channel (105 NBC HD) on the QAM turner, both audio and video are fine.

If I record the SD channel (5 NBC) via the analog tuner, both audio and video work fine.

I have tried various combinations of the BDA Muxes (MS DVR-MS, ATI, Cyberlink, TS,...) along with various combinations of the Playback Audio Decoder (AC3 Filter, ffdshow, MPEG Audio decoder, Intervideo, ...), all with the same or worse results.

In the resulting MPG files (Cyberlink Mux) when analyzing with GSpot,

• the audio track for SD channel was 0xbd[0x80]:48000Hz 96 kb/s , mono (1/0)
  
• the audio track for HD channel was 0xbd[0x80]:48000Hz 384 kb/s tot , 6 chnls (3/2 .1)

What must I do to get the SD channel AUDIO to record (and playback) both on the Analog tuner (ok) and QAM tuner (not ok for SD broadcast)?

Worse case, I guess I can simply delete the SD channels from the QAM tuner, but that limits both my recording AND viewing capabilities.

Any suggestions?

I'd be glad to supply logs for any of the combinations that should work.

[sub]

I'm not aware of any problem with this.

Are you able to do a 10-15 second recording of one of these channels using the TS Mux option, and make it available for me to download?

[JavaWiz]

Recording (and logs) can be downloaded from here:

http://home.comcast.net/~damicoa/BDA_Recording.zip

This is a SD recording via the QAM tuner with the TS Mux. Video works, audio does not (Using CyberLink decoder and ffdshow audio w/AC3).

[sub]

Can you post your *.cache files from the BDA directory?

[JavaWiz]

BDA directory, includes 1 cache file: SCAN-1.cache

[sub]

I though I'd be able to work it out from your cache file, but I dont think I can. Do you know which channel this file was recorded on? I'm trying to find out the tuning request it related to (from your cache file).

...or ideally the GBPVRRecordingService.exe-native.log file that showed this recording occurring.

[JavaWiz]

I though I'd be able to work it out from your cache file, but I dont think I can. Do you know which channel this file was recorded on? I'm trying to find out the tuning request it related to (from your cache file).

...or ideally the GBPVRRecordingService.exe-native.log file that showed this recording occurring.

5KINGYES79.4T:79,79,4~P:4~V:2176~A:2178~PMT:51~PCR:2176~N:>79.4 Unknown4 (000(AC3))

and attached recording logs. It should be the last recording attempt.

[sub]

That channel has two audio streams, which would have caused it to turn up twice during the channel scan. One is english, the other is spanish. You chose to map to the spanish channel (ie, channel = the video stream + spanish audio stream). This spanish stream seems to carry an empty audio stream. The english audio is filtered out and thrown away in the recording process. I'm guessing maybe the english one would have had real audio? Maybe they only supply the spanish audio some times?

[JavaWiz]

That channel has two audio streams, which would have caused it to turn up twice during the channel scan. One is english, the other is spanish. You chose to map to the spanish channel (ie, channel = the video stream + spanish audio stream). This spanish stream seems to carry an empty audio stream. I'm guessing maybe the english one would have had real audio? Maybe they only supply the spanish audio some times?

Excellent!! Thank you for figuring that out, I will remap that channel.

If it's not too difficult, could you explain how you determined that it was Spanish? I have several other channels and may have inadvertently mapped them wrong as well.

[sub]

I had to use TSReader to look at your transport stream recording, and it has an area that shows the "PMT", where it lists the various streams for that channel. In that info I could see the video pid was 2176, and two audio pids 2177 (english) and 2178 (spanish). I could see from your tuning request "V:2176~A:2178", ie audio pid 2178.