No recording or LiveTV from AC3 or HD channels

[kendrak24]

Yes, in WMP it works. Also viewing it on PCH gives sound, so it's probably a codec problem.

[mvallevand]

You could be running into this problem now (also from Sweden) http://forums.nextpvr.com/showthread.php?t=41385

Martin

[kendrak24]

Yes, seems like I have. Just recorded from a AC3 channel (not HD), and on pch (mvpmvx2) I get silence. If I play it with the native pch player I see that there are 2 audio streams, Stream 1=MPEG=silent, Stream 2=AC3=sound.

[mvallevand]

With mvpmcx2 you can select alt channels with the audio key. Could you try and play a file with mvpmcx2 and telnet to your PCH and issue this command and capture the screen

cat /tmp/dumpts.txt

I am curious what this is showing

Martin

[kendrak24]

Thanks, it worked to switch audio channel with the audio key after updating mvpmcx2

Here is the dumpts.txt content:

Read 200000 bytes 4

New PAT
transport_stream_id : 1
version_number : 1
| program_number @ [NIT|PMT]_PID
| 1091 @ 0x107 (263)
active : 1

New active PMT
program_number : 1091
version_number : 1
PCR_PID : 0x1007 (4103)
] 0x09 : "@"
] 0x09 : "w"
| type @ elementary_PID
| 0x02 (ISO/IEC 13818-2 Video) @ 0x1007 (4103)
| 0x03 (ISO/IEC 11172 Audio) @ 0x1107 (4359)
| ] 0x0a : "swe"
| 0x06 (ISO/IEC 13818-1 Private PES data packets) @ 0x1f07 (7943)
| ] 0x56 : "sweswe"
| 0x06 (ISO/IEC 13818-1 Private PES data packets) @ 0x1207 (4615)
| ] 0x0a : "swe"
| ] 0x6a : ""

[mvallevand]

I remember now, because I was finding lots of empty ac3 audio streams, I gave mp2 and ac3 equal priority. I probably should make this a user setting. One that might interest you if you didn't notice it is --pref-lang swe if you find an English track on any of your channels.

Martin

[sub]

Yes, in WMP it works. Also viewing it on PCH gives sound, so it's probably a codec problem.

If you can supply a short sample .ts file, I'll download it and take a look.

[kendrak24]

It seems like, after the PsiParser patch, recordings from channels that have 2 audio streams plays without sound in the pc client when it's mpeg sound (AC3 works fine now). That is, when I play them in another player there is sound in the mpeg stream and not in the AC3 stream (as I think I've read that gbpvr does only record the first audio stream). No biggie for me since I normally use the PCH for playback, and there it works.

Perhaps a bit clearer:

* Recordings from channels with 1 audio stream (mpeg or AC3):
OK

* Recordings from channels with 2 audio streams (mpeg and AC3):
Records OK.
pc client seems to always choose audio stream 2 on playback, even if it's audio stream 1 that is recorded.


Example media info below, audio was recorded from stream 1 (mpeg) but silent on playback with pc client:

General
ID : 1
Complete name : E:\TV\Porco Rosso\Porco Rosso_20090802_07000830.ts
Format : MPEG-TS
File size : 18.5 MiB
Duration : 35s 89ms
Overall bit rate : 4 430 Kbps

Video
ID : 4130 (0x1022)
Menu ID : 1144 (0x478)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, Matrix : Default
Duration : 35s 89ms
Bit rate mode : Variable
Nominal bit rate : 10 000 Kbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16/9
Frame rate : 25.000 fps
Standard : PAL
Colorimetry : 4:2:0
Scan type : Interlaced
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.965

Audio #1
ID : 4386 (0x1122)
Menu ID : 1144 (0x478)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Bit rate mode : Constant
Bit rate : 256 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Resolution : 16 bits
Video delay : -653ms
Language : Swedish

Audio #2
ID : 4642 (0x1222)
Menu ID : 1144 (0x478)
Format : AC-3
Format/Info : Audio Coding 3
Language : Swedish
Encryption : Encrypted

Text
ID : 7970 (0x1F22)
Menu ID : 1144 (0x478)
Format : Teletext
Language : Swedish