Re: em28xx_isoc_dvb_max_packetsize for EM2884 (Terratec Cinergy HTC Stick)

Hans Petter Selasky
2011-12-25T14:19:19Z

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