Re: [hatari-users] AVI Record problem -> ODML 64 bit support added

[Anders Eriksson <ae@xxxxxx>]

On Wed, 30 Aug 2017, Anders Eriksson wrote:

> On Mon, 28 Aug 2017, Nicolas Pomarède wrote:
>
> > Le 11/07/2017 à 15:50, Nicolas Pomarède a écrit :
> >
> > > I see AVI specs 2.0 can have extra AVIX chunks to have > 2GB in the end. I 
> > > will try to look at this someday (but it might not be soon)
> > Hi,
> >
> > good news, Hatari now support the "OpenDML AVI File Format Extensions 
> > Specification" which extends the basic AVI format limited to 32 bit file 
> > size to handle file size of any size > 4GB.
> >
> > I made some tests and successfully recorded a 7 GB file which I could read 
> > using VLC (including seeking anywhere using the indexes), some avi 
> > validation programs also reported a correct structure of the file.
> >
> > For the technical details, the ODML format divides the AVI file in several 
> > RIFF AVI or RIFF AVIX (X=extension) chunks. Each chunks should be < 4GB but 
> > you can have as many as you like and some new "super indexes" are added to 
> > allow referencing position using 64 bit offset.
> >
> > In Hatari, I arbitrarily fixed the super index size to 256 entries, each 
> > entries would then reference a 1 GB 'movi' chunk.
> >
> > This requires an OS capable of handling 64 bit file offset, but all modern 
> > OSes will do it.
> >
> > This means the current limit for an AVI file will now be 256 GB in Hatari 
> > :)
>
> Great stuff Nicholas!
>
> I really appreciate the effort.

I tested out the new AVI routines this weekend, and the AVI files works 
well. Recorded the entire HIPSid from Grazey, nearly 10 hours of footage. 
https://www.youtube.com/watch?v=5jJYPaq6WNQ

So great stuff!

However, a bug report regarding the recording timer.

It prints like this:

mm:ss

00:00
  |
99:59
a0:00
  |
b0:00
  |
z9:59

And after z it starts printing commas, dashes and what not.

I think it would make more sense if the minute counter went to three 
digits (and later to four, five..) or better make it proper with hours and 
maybe days. I ended up checking file size and estimating how long it had 
recorded for rather than trying to understand the counter :)

--
Anders Eriksson
ae@xxxxxx     http://www.dhs.nu/
ae@xxxxxxxxx  http://www.atari.org/