Re: em28xx_isoc_dvb_max_packetsize for EM2884 (Terratec Cinergy HTC Stick)

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On 25.12.2011 20:42, Malcolm Priestley wrote:
On Sun, 2011-12-25 at 15:11 +0100, Hans Petter Selasky wrote:
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.

Would not increasing EM28XX_DVB_NUM_BUFS currently set at 5 to say 10
have a better effect?
This does not work, I just tried it.

Regards,
Dennis
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