From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailfe09.c2i.net ([212.247.155.2]:51370 "EHLO swip.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751306Ab1LYOTT (ORCPT ); Sun, 25 Dec 2011 09:19:19 -0500 From: Hans Petter Selasky To: Dennis Sperlich Subject: Re: em28xx_isoc_dvb_max_packetsize for EM2884 (Terratec Cinergy HTC Stick) Date: Sun, 25 Dec 2011 15:11:54 +0100 Cc: Mauro Carvalho Chehab , linux-media@vger.kernel.org, Michael Krufky , Devin Heitmueller References: <4EF64AF4.2040705@gmail.com> <4EF70077.5040907@redhat.com> <4EF72D61.9090001@gmail.com> In-Reply-To: <4EF72D61.9090001@gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201112251511.54080.hselasky@c2i.net> Sender: linux-media-owner@vger.kernel.org List-ID: On Sunday 25 December 2011 15:04:17 Dennis Sperlich wrote: > On 25.12.2011 11:52, Mauro Carvalho Chehab wrote: > > On 24-12-2011 19:58, Dennis Sperlich wrote: > >> Hi, > >> > >> I have a Terratec Cinergy HTC Stick an tried the new support for the > >> DVB-C part. It works for SD material (at least for free receivable > >> stations, I tried afair only QAM64), but did not for HD stations > >> (QAM256). I have only access to unencrypted ARD HD, ZDF HD and arte HD > >> (via KabelDeutschland). The HD material was just digital artefacts, as > >> far as mplayer could decode it. When I did a dumpstream and looked at > >> the resulting file size I got something about 1MB/s which seems a > >> little too low, because SD was already about 870kB/s. After looking > >> around I found a solution in increasing the isoc_dvb_max_packetsize > >> from 752 to 940 (multiple of 188). Then an HD stream was about 1.4MB/s > >> and looked good. I'm not sure, whether this is the correct fix, but it > >> works for me. > >> > >> If you need more testing pleas tell. > >> > >> Regards, > >> Dennis > >> These numbers should not be hardcoded, but extracted from the USB endpoint descriptor! --HPS