xawtv over remote network

mlybarger · Guru Joined: 04 Sep 2002 Posts: 475

not really gentoo specific, but wth. does anyone know if it's possible to run xawtv over a network? if so, how does this need to be setup? i ssh into the remote box that has an ati aiw 128 pro card, and try to run xawtv, but it either can't open the display or can't find /dev/video0 stuff. the remote box has a radeon 7000 (shoulda stuck with a couple aiw 128 cards

). any helps would be most appreciated.

mihochan · Posted: Wed Oct 09, 2002 5:04 am Post subject:

After logging into the reomte box, try the following,

raziel · n00b Joined: 28 Sep 2002 Posts: 38 Location: CO

All you need to do is run xawtv --remote. HOWEVER:

Because of the way ATI TV cards work (i.e. just viewing an overlay instead of doing any real frame grabbing) you're not gonna be able to use a remote display with it. Last I checked, it just wasn't supported. You're lucky to be able to use xawtv for a local display. There was a long time there that we couldn't.

As it stands, the ATI TV cards are rather weak for actual TV use in Linux. You may notice that to do de-interlacing, it actually discards/drops/ignores half the frames! It sucks for video gaming

mlybarger · Guru Joined: 04 Sep 2002 Posts: 475

koala · Posted: Wed Oct 09, 2002 6:48 pm Post subject:

I'm having success running xawtv and xawdecode from a remote machine (but on a BT878 type card), you just need to disable the usage of video acceleration extensions and set the display mode not to overlay video (grabdisplay in xawdecode).

However, audio still has me. xawdecode tries to mmap the audio device, and so I cannot esddsp it over the network. I'm thinking of wrapping it through artsdsp, but I don't have arts installed in that machine... any ideas?

zen_guerrilla · Guru Joined: 18 Apr 2002 Posts: 343 Location: Greece

It works here too w/ a BT878 card.
koala : Anything new on the audio thing ?

.:: zen ::.

zen_guerrilla · Guru Joined: 18 Apr 2002 Posts: 343 Location: Greece

It works here too w/ a BT878 card.
koala : Anything new on the audio thing ?

.:: zen ::.

Mitchybums · n00b Joined: 29 Jan 2003 Posts: 68 Location: iowa

over ssh it works great with x forwarding enabled, xawtv -remote.
audio is still a problem. I got it working by using a 30ft extensioncord from my server(with tvcard) to my laptop.
Xawtv itself doesnt seem to do anything with the audio. it just bturns it on, and that makes it come out of the tv card's audio. If you have a soundcard loop on it, the soundcard just forwards it without use of the computer itself to the speaker output.
Because it works this way, it uses less cpu power, but it's pretty much impossible to grab for remote usage.
I tried esd and arts, and I could get xmms working remotely on both of them.
I played with real producer and realserver, and that actualy worked because the commandline options for producer actualy alow you to grab from the line in.
Problem in this senario is the changing of channels.
tried stuff to use xawtv for video and realproducer for audio, but it's got a 20sec lag.
icecast and livecast work better, but even with buffering disabled it has a 5 sec lag.

if someone knows how to grab audio from the device and put it in esd or arts, that should work.
I even inserted the btv audio module, and could play with it in kmix, but still the audio came out of the soundcard of my server instead of my laptop.

hope it's usefull for someone to come to a solution.
(also had a look at the new mediaapplicationserver.com, but doesnt seem to work for it either)

commanderfoxtrot · Posted: Sun Feb 09, 2003 7:21 pm Post subject: Moving the audio over the network

Re getting the audio over the network, the btaudio help file (somewhere in /usr/src/linux/Documentation) shows how to use sox to send the sound data to the speaker from the btaudio device. It would be simple to rewrite this to send it to esddsp. Even an NFS-shared FIFO may work!

Try a google search for this sort of thing: it's not a gentoo-centric problem.

Twink · Posted: Sun Feb 09, 2003 9:11 pm Post subject:

I seem to remember hearing that you can export local hardware as a block device for other computers to use as if it was local hardware, so if you can export video0 and dsp0, then capture from dsp0's linein and pipe it out to your own sound card, dunno sounds good to me no idea how to do it thou =(

zephred · Posted: Sun Feb 09, 2003 10:18 pm Post subject:

You may also use ffserver from ffmpeg, and view the stream from the remote machine with mplayer. I think there is plenty of other streaming softwares around...

Mitchybums · n00b Joined: 29 Jan 2003 Posts: 68 Location: iowa

Streaming servers work, but the only thing that I ever got working with audio is realproducer and realserver. everything else didnt work for me.
problem is that it's a pain to change channels.
(stop the streaming command, change channel, start streaming, reconnect client and wait 20 secs for it to catch up.)

the only thing I found so far for the audio working with xawtv -remote is a 30 ft extension cable

cbreaker · Posted: Sun Mar 02, 2003 4:28 am Post subject:

koala · Posted: Mon Mar 17, 2003 8:45 pm Post subject:

Got it!

For listening A's tv on B:

Started esd on B with:

esd -tcp -public -promiscuous -nobeeps

And ran sox on A:

sox -c 2 -w -r 32000 -t ossdsp /dev/dsp -t sw - | esdcat -r 32000 -s <<B's IP address>>

Docs on /usr/src/linux/Documentation/sound/btaudio

thinair · Posted: Tue Mar 18, 2003 4:49 pm Post subject:

nice tips

thanx,
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puggy · Posted: Thu Jul 10, 2003 3:26 pm Post subject:

I'm trying to get xawtv to work over my network. I've got an old cyrix 6x86 box downstairs with a hauppauge tv-card in and it works fine on the local desktop.

However when I try to watch it over the network over ssh it displays a frame every few seconds and that's it. The network actvity is only about 70K according to gkrellm, I was expecting it to be a bit higher than that for the video stream. Is this an X issue or is there something I've missed. I've tried running xawtv