[vdr] Instability with recordings on VDR-1.7.4 when recording to a NTFS partition

Klaus Schmidinger Klaus.Schmidinger at cadsoft.de
Sun Mar 22 18:34:55 CET 2009


On 22.03.2009 15:36, Niedermeier Günter wrote:
>> Well, if there are buffer overflows and the TS data is corrupted, it's
>> no wonder the index file stops growing.
>>
>> Does this happen on all channels, or only on some (or even only on a
>> particular one)?
>>
> 
> Additional infos:
> 
> I recompiled older versions beginning at 1.7.3 and made some tests.
> 
> 1.7.3 acts exactly like 1.7.4
> one record -> bufferoverflow
> The native networkthroughput is between 2,8-3,7 Mega Bytes /s
> for one stream. -> Much to high I think!
> 
> 1.7.2 seems to be o.k.
> one record -> no problem -> throughput is between 0,8-1,2 MB/s
> two records -> no problem -> throughput is between 1,8-2,6 MB/s
> three records -> no problem -> throughput is between 2,8-4,0 MB/s
> four records -> PES pkt shortened -> throughput is between 3,8-5,4 MB/s
> 
> All tested while using the "slower" NFS share.
> 
> Why does one TS stream require a three times higher
> bandwidth in 1.7.3/1.7.4 than a PES stream in 1.7.2 do?

A TS recording is only marginally more data than the same length recording
in PES. I don't think that recording in TS should require so much more bandwidth
than PES.

There must be an other problem that's causing this, but since this doesn't
happen here on my system, I'm afraid you'll need to do the debugging ;-)

Just to be sure: this *is* an unpatched version 1.7.4. we're talking about,
right?

Klaus



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