linux-kernel - Re: Re: dvb usb issues since kernel 4.9

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Message-ID: <20180108214055.1945c509@redhat.com>
Date:   Mon, 8 Jan 2018 21:40:55 +0100
From:   Jesper Dangaard Brouer <jbrouer@...hat.com>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Josef Griebichler <griebichler.josef@....at>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com>,
        Rik van Riel <riel@...hat.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Hannes Frederic Sowa <hannes@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Jonathan Corbet <corbet@....net>,
        LMML <linux-media@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        David Miller <davem@...emloft.net>,
        <torvalds@...ux-foundation.org>
Subject: Re:  Re: dvb usb issues since kernel 4.9



On Mon, 8 Jan 2018 12:35:08 -0500 (EST) Alan Stern <stern@...land.harvard.edu> wrote:

> On Mon, 8 Jan 2018, Josef Griebichler wrote:
> 
> > No I can't sorry. There's no sat connection near to my workstation.  
> 
> Can we ask the person who made this post:
> https://forum.libreelec.tv/thread/4235-dvb-issue-since-le-switched-to-kernel-4-9-x/?postID=75965#post75965
> 
> to run the test?  The post says that the testing was done on an x86_64 
> machine.

For >5 years ago I used to play a lot with IPTV multicast MPEG2-TS
streams (I implemented the wireshark mp2ts drop detecting, and a
out-of-tree netfilter kernel module to detect drops[1]). The web-site
is dead, but archive.org have a copy[2].

Let me quote my own Lab-setup documentation[3].

You don't need a live IPTV MPEG2TS signal, you can simply generate your
own using VLC:

 $ vlc ~/Videos/test_video.mkv -I rc --sout '#duplicate{dst=std{access=udp,mux=ts,dst=239.254.1.1:5500}}'

Viewing your own signal: You can view your own generated signal, again,
by using VLC.

 $ vlc udp/ts://@....254.1.1:5500

I hope the vlc syntax is still valid.  And remember to join the
multicast channels, if you don't have an application requesting the
stream, as desc in [4].


[1] https://github.com/netoptimizer/IPTV-Analyzer
[2] http://web.archive.org/web/20150328200122/http://www.iptv-analyzer.org:80/wiki/index.php/Main_Page
[3] http://web.archive.org/web/20150329095538/http://www.iptv-analyzer.org:80/wiki/index.php/Lab_Setup
[4] http://web.archive.org/web/20150328234459/http://www.iptv-analyzer.org:80/wiki/index.php/Multicast_Signal_on_Linux
-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer