On Mon, 4 Oct 2004, Martin Samuelsson wrote:
> On Monday 04 October 2004 17:11, Richard Ellis wrote:
> > would then work with the file. However, they are not totally happy
> > with the "fix", they seem to read the whole entire file from disk
> > first before doing anything at all with it. But at least it worked.
>
> I'm guessing this is due to the missing index chunk that's supposed to be
> present at the end of the file. mplayer should be able to fix this, but I
> haven't tried yet.
It has been several years since I recorded to the .avi format but
I do remember the very long startup times (with the disc seeking
a lot) as the file was read from start to finish.
The other problem that is encountered with the AVI format is the 2GB
limit. Yes, there is the ODML extension but mjpegtools hasn't
implemented it.
> I think it's a pity lavtools doesn't support any easily streamable format.
> That would make building timeshifters easier.
I'm confused (or missing something ;)). How does 'streaming' make
'timeshifting' easier? Streaming is (to me) a distribution mechanism
for viewing encoded (mpeg-2 or mpeg-4) content. It takes a pretty
fast network connection to stream the other formats (uncompressed
standard definition "video" is 124Mb/s as I recall).
For timeshifting what's needed is a good sequential I/O file format.
Something like 'raw DV' or perhaps IYUV (or the YUV4MPEG2 variant) -
both use fixed record sizes so there's no indexing involved (and since
you know the frame rate and size you can seek by time using simple
arithmetic ;)). No filesize limits with those formats.
If you're capturing to do encoding later then 'streamability' isn't
needed but good sequential I/O is important. Quicktime should be fine
for that. AVI format is not all that good since it has the 2GB limit
and the indexing issue.
I'm not sure which versions were used - but the perhaps the recent
libquicktime might have fixed the problems that were encountered in
the past.
Cheers,
Steven Schultz
-------------------------------------------------------
This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
Use IT products in your business? Tell us what you think of them. Give us
Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
http://productguide.itmanagersjournal.com/guidepromo.tmpl
_______________________________________________
Mjpeg-users mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/mjpeg-users
