On Wed, 1 Mar 2006, Jerome Cornet wrote:
> Unfortunately in Canada they still sell NTSC-only DVD players, and
> there's no way you can play PAL-DVDs on those.
Hmmm - are the same model(s) of DVD players available in Canada as
in the US? Both are region 1 and NTSC so they might be the same.
I was (pleasantly) surprised to put a PAL DVD (sent from Austria)
in and "it just worked". Philips makes some very nice (but inexpensive)
DVD players :) Nothing in the manual, packaging, etc said anything
about "PAL".
> I like general purpose tools :-) yuframestofields and yufieldstoframes
> are really handy if you are doing any kind of processing that requires
> progressive frames, but you still need to go back to interlaced video
> after that.
Wouldn't it be simpler/easier to call y4m_read_fields() to get
the two fields into separate buffers? Then y4m_write_fields() will
put them back into an interleaved frame. It sounds like you're
really going after contiguous lines of a field in a single buffer
so you don't have to worry about the stride. the y4m_*_fields()
routines will do that for you.
The other thought was that the two programs mentioned above could
be combined into a single program with a switch that specifies if it's
fields->frames or frames->fields being done.
For standards conversion the best results seem to come from what's
called "optical flow analysis" but it's extremely cpu intense.
If you've FinalCutPro handy the Nattress plugins for standards
conversion are reported to be excellent quality and fast:
http://www.nattress.com/Products/standardsconversion/standardsconversion.htm
Cheers,
Steven Schultz
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