Problems with TS Mux recordings

[bgowland]

I've just been trying some TS Mux recordings which seem to go without a hitch but when played back with PVRX2 at my computer (not MVP), the video is fine but there's no audio. VLC plays them without a problem.

I use the MPA audio decoder which normally gives no problems. I tried the Intervideo for Hauppauge decoder which is the only other one I have, and I got sound but it was like people were talking in slow-motion.

Also, if I find the .ts file in Video Library and select Transcode and the TS to MPEG2 option, the popup says it's starting the transcode then disappears within a second or two - nothing in the logs to explain things and no transcoded mpg file (obviously).

I tried opening/rendering one of the .ts files in Graphedit using the GB-PVR TS Reader and the demux 'grew' three audio pins (AAC, AC3 and Audio) which were rendered through audio decoders to three Default DirectSound filters. The PID mappings for the Video and Audio output pins were correct for the relevant streams but still no audio on playback (video was again fine).

The playback issue seems to be audio decoder related but I don't have any other mpeg1/2 audio decoders installed. Any suggestions?

As for transcoding, this is essential as we do pretty much all viewing via the MVP.

Cheers,
Brian

[sub]

There is a known issue that causes the MPA audio decoder to not connect to the GB-PVR TS Reader, so for now you do need to try a different audio decoder.

With the slow motion audio, do you have AC3 Filter on your machine? We've only seen this to date with this on a machine. First try the "force sound card to reinit after seek/pause" AC3Filter setting. If that doesnt work you might need to try temporarily disabling AC3Filter.

Also, if I find the .ts file in Video Library and select Transcode and the TS to MPEG2 option, the popup says it's starting the transcode then disappears within a second or two - nothing in the logs to explain things and no transcoded mpg file (obviously).

I'll have to check that out and come back to you.

[bgowland]

There is a known issue that causes the MPA audio decoder to not connect to the GB-PVR TS Reader, so for now you do need to try a different audio decoder.

When I open one of the .ts files in Graphedit using the GB-PVR TS Reader filter and render the output pin, the demux's output pins are connected without problem. The AAC output to the Monogram AAC decoder and the AC3 and Audio pins to two instances of the MPA decoder. Outputs of the decoders then go to Directsound filters so there's no connection issue at that point.

Interestingly, if I create my own MPEG1 Audio pin on the demux, remap the audio ES PID to it then connect it to the MPA Decoder originally used for the auto-created 'Audio' pin, I get audio when I play the graph. It seems the MPA decoder doesn't have a problem with the GB-PVR TS Reader in this case, just the audio pin that the demux auto-creates.

With the slow motion audio, do you have AC3 Filter on your machine? We've only seen this to date with this on a machine.

I only have a filter called 'AC3 Parser Filter' which is mpg2splt.ax (native DShow?) - I'm guessing that's not what you mean.

Also, if I find the .ts file in Video Library and select Transcode and the TS to MPEG2 option, the popup says it's starting the transcode then disappears within a second or two - nothing in the logs to explain things and no transcoded mpg file (obviously).

I'll have to check that out and come back to you.

I see from the log that it was using ffmpeg for the transcode. I managed a GB-PVR TS Reader -> demux -> ATI mux - > File writer transcode in Graphedit. I'll try ffmpeg manually to see how it goes.

Cheers,
Brian

[BigMoose]

I've found with 1.3.7 if I use the TS Mux for SD mpeg2 channels, I get slow motion audio when I skip through the recording. I'm using AC3Filter as I dont know what other options there are to output directly to SPDIF for an external amp. I've switched to the cyberlink mux and all is fine, except I can no longer record >1 channel from the TP at the same time...

[crlorentzen]

I'm seeing a similar problem with the GBPVR Native TS Parser. It always connects two Audio Output pins to my ffdshow which causes the SPDIF to get locked via the AAC connection and not AC3, so I get no sound.

If I watch the same ts file using Media Player Classic, and my preferred demuxer (Haali Media Splitter) everything is fine. I have set GBPVR to not use the internal splitter as a method to work around this, however, it still uses the internal splitter.

Code:

config.xml
<UseBuiltInTSReader>false</UseBuiltInTSReader>
pvrx2-native
2008-11-08 11:31:35.296    INFO    DirectShowPlayerBase::playVideoFileTS(E:\Recorded TV\Temp\Copy of Winx Club_2_20081108_11301200.ts)
2008-11-08 11:31:35.296    VERBOSE    Creating new graph
2008-11-08 11:31:35.312    VERBOSE    Forced audio reference clock to TS reader filter
...
2008-11-08 11:31:35.437    VERBOSE    Graph contains the following filters:
2008-11-08 11:31:35.437    VERBOSE     - Default DirectSound Device 0005
2008-11-08 11:31:35.437    VERBOSE     - Default DirectSound Device
2008-11-08 11:31:35.437    VERBOSE     - Video Renderer
2008-11-08 11:31:35.437    VERBOSE     - MPV Decoder Filter
2008-11-08 11:31:35.437    VERBOSE     - ffdshow Audio Decoder 0002
2008-11-08 11:31:35.437    VERBOSE     - ffdshow Audio Decoder
2008-11-08 11:31:35.437    VERBOSE     - GB-PVR Flow Status
2008-11-08 11:31:35.437    VERBOSE     - MainConcept (HCW) Layer II Audio Decoder
2008-11-08 11:31:35.437    VERBOSE     - MPEG-2 Demultiplexer
2008-11-08 11:31:35.437    VERBOSE     - SOURCE

If I play the same file in Media Player Classic, it works find and uses Haali Media Splitter (I can see the tray Icon) Neither setting, either true/false for UseBuiltInTSReader makes any difference to the loaded codecs or the graph generated by GBPVR. Perhaps this is related.

I used this registry setting so that I could connect to the remote graph
HKEY_LOCAL_MACHINE\Software\Devnz\AddGraphToROT=1 (DWORD)
And took the attached screenshots

[patd]

I have tried using the TS Mux to get multi-record working. That works great which is fantastic.

...

but the audio is slow and distorted when watching TV (fine via other media players pointing at recorded files) I'm using Nero Digital Audio Decoder. Same result as MPA

logs attached
Cheers

[fuzzweed]

I think subs advice was to try AC3filter for your audio codec, and tick "force soundcard to reinit..." on the AC3filter system tab if the problem continues.
Worked for me.

[whurlston]

I only have a filter called 'AC3 Parser Filter' which is mpg2splt.ax (native DShow?) - I'm guessing that's not what you mean.

Just saw this post. AC3Filter: http://www.ac3filter.net/

[rroor]

I have a similar problem with TS Mux recordings: either no sound or "slow motion" audio. These recordings work perfectly with VLC or MPC with Haali. Is the only solution to remove the AC3Filter?
Second problem: I have tried to disable the built-in TSReader but without success, GBPVR is still using internal splitter. I am using 1.3.7 release.

[Deusxmachina]

I get this, too. Slow-motion audio but video is fine. I have AC3filter installed, but I use spdif through Dscaler5, (the easiest way I've found to setup spdif, AC3filter/FFdshow is a pita in comparison). Maybe Dscaler5 actually uses AC3filter in some way, though, I don't know.