s.huelswitt@gmx.de(Stefan Huelswitt) 22.06.05 15:11
On 22 Jun 2005 Rainer Zocholl <UseNet-Posting-Nospam-74308-@zocki.topp
Klaus Schmidinger wrote:
Isn't all that data protected by CRC32 checksums? How could "garbage" get in there? Maybe somebody should try to find out why that "garbage" is produced in the first place...
I've seen this - though at least one year ago - with bad reception due to bad weather. For half an hour, the system time was jumping back and forward like crazy, starting and stopping some timers. Luckily, all timers were repeating, so none of them was gone after reception was back.
So: Who is doing the CRC checks?
If CRC checking is enabled on dmx-filter setup (dmx_sct_filter_params.flags |= DMX_CKECK_CRC), the driver does it for you.
And what happens with the data if it fails? Is it decarded or just "tagged" to be invalid?
VDR doesn't enables the check.
Ah, that explains easily the "garbage" in "time", or? Does that explain the "unknown picture type" problem too?
This would be difficult, as not all tables are CRC protected.
VDR knows which tables are CRC protected, or not?
Rainer