[linux-dvb] How to stream DVB-S2 channels over network?

Artem Makhutov artem at makhutov.org
Sun Dec 21 15:04:16 CET 2008


Hi,

On Sun, Dec 21, 2008 at 03:29:45AM +0100, BOUWSMA Barry wrote:
> On Sat, 20 Dec 2008, Artem Makhutov wrote:
> 
> > 1. The stb0899 driver is broken and is producing a bad stream
> > 2. The network streaming of VLC and dvbstream is broken
> 
> Use the `-o:' option of `dvbstream' to write to a file,
> then see if this file is corrupted or damaged.  If this
> is so, then case 1 above would be correct.
> 
> 
> > Do you know any other methods to stream a DVB-S2 channel over network?
> 
> There's no difference between a DVB-S2 channel and any
> other source of 188-byte Transport Stream packets, be
> they video, radio, data, or whatever.
> 
> I've used `dvbstream' in the past to stream multicast
> data; the problem I had was in the limited support of
> the players I was using to handle the stream properly.
> I also think I may have had to hack `dvbstream' slightly
> to properly support and tag the payloads, though I may
> be mis-remembering.
> 
> At the moment I'm using `dvbstream' to stdout, then
> piping that to extract the audio payload of interest,
> which I then pipe to a different streaming program that
> performs better for a simple audio stream without the
> excess overhead of the TS, and it's working well.
> 
> The only problem I've had has been the interaction with
> the various hardware I use on the purity of the stream
> -- if the USB ethernet is connected one way, it causes
> the stream from the DVB receiver to be corrupted, and
> if the receiver is connected through a particular USB
> hub, its stream is again corrupted occasionally.  It is
> all very annoying when I forget, and confusing to try
> and track down these imperfections -- for example, I've
> now determined that a particular external USB->HDD
> adapter cannot be connected directly to my EHCI card,
> nor to the first hub, but seems fine when a second hub
> is connected to the first, then the disk to that
> daisy-chain.  And on another machine, the two EHCI USB
> ports don't work at all, while working wonderfully with
> NetBSD.
> 
> That off-topic rambling was to note that problems often
> may be caused by seemingly unrelated things for reasons
> which I cannot understand, not being intimate with the
> kernel internals or how hardware works.
> 
> Back on-topic, I have used `dvbstream' to multicast TS
> of radio and video, tuning directly with it (i.e., no
> `szap' needed) with no real problems, though it is the
> standard `dvbtools' version that I've undoubtedly hacked.

Everything looks like my SkyStar HD/TT-3200 is producing a little bit
currupt stream for DVB-S2 under linux. DVB-S looks prette good.
I will try to playback the recorded stream under Windows
today afternoon.

Thanks and Regards, Artem



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