[vdr] Re: .vdr maximum file size

[Wolfgang Fritz <wolfgang.fritz@gmx.net>]

Klaus Schmidinger wrote:
> Wolfgang Fritz wrote:
>
> > Hello,
> >
> > is there a technical reason why the maximum file size of a .vdr file is
> > limited to 2000MB? Some postprocessing tools accept neither multiple
> > input files nor FIFOs as input file so a time and disk space cosuming
> > "cat"-ing to one big vdr file is required.
>
> Keeping the files below 2GB makes sure VDR will work on _any_ system.
OK. It's a design decision then.

> Besides, using 64 bit file offsets would cause an unnecessary bloat
> in the index file.
Really? Lets look at an example:
bash(18)ll
insgesamt 2675148
-rw-r--r--    1 vdr      users    2097411106 Feb 28 16:40 001.vdr
-rw-r--r--    1 vdr      users    640836486 Feb 28 16:41 002.vdr
-rw-r--r--    1 vdr      users     1088688 Feb 28 16:41 index.vdr
-rw-r--r--    1 vdr      users           0 Feb 28 16:46 marks.vdr
-rw-r--r--    1 vdr      users           4 Feb 28 16:47 resume.vdr
-rw-r--r--    1 vdr      users         278 Feb 28 16:36 summary.vdr

A recording of abt 2700MB has an index file of abt 1 MB. Using 64 bit 
file offsets would double the index file size to 2 MB which gives 
1MB/2700MB = 0.03% more data. BTW, 32 bit offsets should be good for 4G 
files, which could hold most movies in one file (of course that won't 
work with 32 bit offs_t).

Wolfgang

> Klaus



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