12 replies to this topic

[ambrosa]

Hi folks !

Probably the answer is NOT but ....

Question:
Suppose I've two different channels transmitted
It's possible to watch video pid of channel "A" and have audio from channel "B" as a real-time mix ?

Example: yesterday I want to see MotoGP Qatar race. In Italy there is not a full-HD feed: only SD (bleah !)
I've found a foreign channel with superb full-hd image but comment is not in italian language.
So the idea is to watch foreign channel in full-hd (i.e. tuned on TUNER A) but listen audio from italian channel (i.e. tuned on TUNER B )
Is it possible ?

Edited by ambrosa, 9 April 2012 - 07:58.

[nietgiftig]

Audio-Pip plugin?

[Erik Slagter]

Example: yesterday I want to see MotoGP Qatar race. In Italy there is not a full-HD feed: only SD (bleah !)
I've found a foreign channel with superb full-hd image but comment is not in italian language.
So the idea is to watch foreign channel in full-hd (i.e. tuned on TUNER A) but listen audio from italian channel (i.e. tuned on TUNER B )

Hehe, I know exactly what you mean...

The problem is the "workflow" of the hardware, the "hardware" demuxer. You give the demuxer a transport stream (exactly one), the demuxer picks out the audio and the video streams and sends them to the decoders. That means that in theory you could select any audio track from the same transport stream (transponder), but not from another and also not from another tuner. I don't think there's a workaround for that. Although, actually you have multiple demuxers, in theory one could select audio from one demuxer and video from another, I don't think that configuration is supported...

[pieterg]

audio pip has the disadvantage that it uses pip for the video, and audio on the main 'screen'.
So one might say the plugin name is misleading

As a result, HD won't work (you get the well known iframe slideshow).

If you would use it the other way around, keep the video on the main screen, and start the other channel on the pip decoder, you would be able to get audio on the analog outputs.
(using the second tv or external pip feature)

I think this would require only minor changes in the audio pip plugin.

[Erik Slagter]

So what you're saying is that the audio and video decoders can take their input from different demuxers?

[pieterg]

no, but you can use video0 and audio1

[pieterg]

(wheras the audio pip plugin uses video1 and audio0)

[Erik Slagter]

So it can work if both channels are on the same transponder?

[pieterg]

or on any transponder, if you have a twintuner

[pieterg]

it's just pip, nothing else (except that you only use the audio of the pip decoder)

[Erik Slagter]

I was under the impression that there are two video decoders for pip purposes, and only one audio decoder, and that the source of both primary video decoder and audio decoder must come from the same demuxer.

[pieterg]

root@et9x00:~# ls -la /dev/dvb/adapter0/
drwxr-xr-x 2 root root 580 Jan 1 1970 .
drwxrwxrwx 3 root root 60 Jan 1 1970 ..
crw-rw---- 1 root root 212, 24 Jan 1 1970 audio0
crw-rw---- 1 root root 212, 26 Jan 1 1970 audio1
crw-rw---- 1 root root 212, 4 Jan 1 1970 ca0
crw-rw---- 1 root root 212, 7 Jan 1 1970 ca1
crw-rw---- 1 root root 212, 10 Jan 1 1970 ca2
crw-rw---- 1 root root 212, 13 Jan 1 1970 ca3
crw-rw---- 1 root root 212, 16 Jan 1 1970 ca4
crw-rw---- 1 root root 212, 19 Jan 1 1970 ca5
crw-rw---- 1 root root 212, 22 Jan 1 1970 ca6
crw-rw---- 1 root root 212, 2 Jan 1 1970 demux0
crw-rw---- 1 root root 212, 5 Jan 1 1970 demux1
crw-rw---- 1 root root 212, 8 Jan 1 1970 demux2
crw-rw---- 1 root root 212, 11 Jan 1 1970 demux3
crw-rw---- 1 root root 212, 14 Jan 1 1970 demux4
crw-rw---- 1 root root 212, 17 Jan 1 1970 demux5
crw-rw---- 1 root root 212, 20 Jan 1 1970 demux6
crw-rw---- 1 root root 212, 3 Jan 1 1970 dvr0
crw-rw---- 1 root root 212, 6 Jan 1 1970 dvr1
crw-rw---- 1 root root 212, 9 Jan 1 1970 dvr2
crw-rw---- 1 root root 212, 12 Jan 1 1970 dvr3
crw-rw---- 1 root root 212, 15 Jan 1 1970 dvr4
crw-rw---- 1 root root 212, 18 Jan 1 1970 dvr5
crw-rw---- 1 root root 212, 21 Jan 1 1970 dvr6
crw-rw---- 1 root root 212, 0 Jan 1 1970 frontend0
crw-rw---- 1 root root 212, 1 Jan 1 1970 frontend1
crw-rw---- 1 root root 212, 23 Jan 1 1970 video0
crw-rw---- 1 root root 212, 25 Jan 1 1970 video1

[Erik Slagter]

root@vu:/dev/dvb/adapter0# ls -l
crw-rw---- 1 root root 212, 17 Jan 1 1970 audio0
crw-rw---- 1 root root 212, 21 Jan 1 1970 ca0
crw-rw---- 1 root root 212, 22 Jan 1 1970 ca1
crw-rw---- 1 root root 212, 23 Jan 1 1970 ca2
crw-rw---- 1 root root 212, 24 Jan 1 1970 ca3
crw-rw---- 1 root root 212, 25 Mar 26 20:05 ca4
crw-rw---- 1 root root 212, 0 Jan 1 1970 demux0
crw-rw---- 1 root root 212, 3 Jan 1 1970 demux1
crw-rw---- 1 root root 212, 6 Jan 1 1970 demux2
crw-rw---- 1 root root 212, 9 Jan 1 1970 demux3
crw-rw---- 1 root root 212, 12 Jan 1 1970 demux4
crw-rw---- 1 root root 212, 1 Jan 1 1970 dvr0
crw-rw---- 1 root root 212, 4 Jan 1 1970 dvr1
crw-rw---- 1 root root 212, 7 Jan 1 1970 dvr2
crw-rw---- 1 root root 212, 10 Jan 1 1970 dvr3
crw-rw---- 1 root root 212, 13 Jan 1 1970 dvr4
crw-rw---- 1 root root 212, 18 Jan 1 1970 frontend0
crw-rw---- 1 root root 212, 19 Jan 1 1970 frontend1
crw-rw---- 1 root root 212, 20 Jan 1 1970 frontend2
crw-rw---- 1 root root 212, 2 Jan 1 1970 net0
crw-rw---- 1 root root 212, 5 Jan 1 1970 net1
crw-rw---- 1 root root 212, 8 Jan 1 1970 net2
crw-rw---- 1 root root 212, 11 Jan 1 1970 net3
crw-rw---- 1 root root 212, 14 Jan 1 1970 net4
crw-rw---- 1 root root 212, 15 Jan 1 1970 video0
crw-rw---- 1 root root 212, 16 Jan 1 1970 video1



Zelfde op de dm8000.

Edited by Erik Slagter, 9 April 2012 - 15:03.