[vlc] Re: PVR250 + 802.11g + VLC

[Phung Chi Kien]

Hi,

I tried to use VLS, download the latest CVS version, and hack the file
vls\src\modules\raw2ts\raw2ts.cpp
I change line 74
#define DELTA_PCR_PTS 50000  -->  #define DELTA_PCR_PTS 1000 (and below
1000)
The delay time between the transmited stream and live video reduce to
smaller than 1s. I am trying to find other points to reduce more delay time.

Phung Chi Kien

----- Original Message -----
From: "Philip Edelbrock" <phil at edgedesign.us>
To: <vlc at videolan.org>
Cc: <kienpc at dubmail.net>
Sent: Tuesday, October 07, 2003 11:26 PM
Subject: Re: [vlc] Re: PVR250 + 802.11g + VLC


>
> I did some testing last night and the latency was about 1.5 - 2 seconds
> with the hardware mpeg-2 encoder card streaming to a wireless laptop.
>
>
> Phil
>
> Phung Chi Kien wrote:
>
> >Hi,
> >I very interrested in VideoLan in streaming live video for my security
> >project. I had the delay time about 2 ~ 3 s when I used V4L video capture
> >card (I think this delay time = encoding mpeg by ffmpeg at sending PC +
> >decoding mpeg by ffmpeg at receiving PC). Can you tell me about the delay
> >time due to the PVR250 encoding mpeg with the real live TV. I hope PVR250
> >can reduce the delay time a half at sending PC.
> >
> >Phung Chi Kien
> >Automation Instituit
> >Hanoi, Vietnam
> >
> >----- Original Message -----
> >From: "Philip Edelbrock" <phil at Ren.netroedge.com>
> >To: <vlc at videolan.org>
> >Sent: Monday, October 06, 2003 7:17 AM
> >Subject: [vlc] PVR250 + 802.11g + VLC
> >
> >
> >
> >
> >>Last week I took a chance at buying an 'OEM' Hauppage PVR250 from eBay
> >>(there are a couple vendors selling them at a 'buy it now' price of
about
> >>$89+s/h, if you are interested). I popped it into my Linux box, updated
my
> >>kernel, got ivtv, and managed to stream 8Mb live TV to my laptop via
> >>802.11g (airport extreme, actually).
> >>
> >>Very cool!  A couple quick notes for those who might want to try it:
> >>
> >>- Make sure your kernel has NO bt848 support built in.  Some of the
> >>drivers in ivtv are tweaked versions of the bt848 drivers.  So, make
sure
> >>you don't conflict with the stock kernel v4l drivers.
> >>
> >>- I had troubles getting the pvr module in vlc to work well.  Not to
> >>mention that it isn't included in the binary provided (you have to built
> >>it yourself).  But, this works just fine:
> >>
> >>cat /dev/video0 | vlc --sout rtp://192.168.1.1
> >>
> >>Loading on the server is almost nothing while streaming.  Use test_ioctl
> >>(in ivtv) to tweak the settings. I found 720x480 NTSC with a bitrate of
> >>8,000,000 worked fine.
> >>
> >>It's also handy that /dev/video0 simply outputs an mpeg-2 stream, so you
> >>can simply capture video by doing:
> >>
> >>cat /dev/video0 > myvideo.mpg
> >>[cntrl-c to stop]
> >>
> >>And then just 'vlc myvideo.mpg' to play.  (Humm, makes it easy to set up
> >>chron jobs for program recording...but my TiVo already does a good job
of
> >>that ;')
> >>
> >>I hope this might be helpful to someone.
> >>
> >>
> >>Phil
> >>
> >>--
> >>This is the vlc mailing-list, see http://www.videolan.org/vlc/
> >>To unsubscribe, please read http://www.videolan.org/support/lists.html
> >>If you are in trouble, please contact <postmaster at videolan.org>
> >>
> >>
> >
> >
> >


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