Hi,

I've written a tutorial on creating an PAL 4:3 interlaced DVD with Pd and Gem.

Biased towards Linux, because that's what I use, might work on OS X and Windows, I haven't tested.

Still some flaws, notably the lack of spatial filtering before fields are discarded (which results in ugly aliasing). I wrote a C program to discard alternate fields from successive frames, if such a tool already exists please let me know - I couldn't find one in netpbm or mjpegtools.

Thanks to Roman and Cyrille for persuading me to use the method of rendering full frames at double framerate then discarding alternate fields.

Note: if you try it out, be prepared to have plenty of disk space free - I needed about 12GB (but I think latest Gem fixes an issue that should halve that to 6GB).

Note: you also need to change the path where images are saved (in "iris.pd").

Links:

https://devel.goto10.org/listing.php?repname=maximus&path=%2Ftutorials%2...

https://devel.goto10.org/dl.php?repname=maximus&path=%2Ftutorials%2Fgem-...

svn checkout https://devel.goto10.org/svn/tutorials/gem-dvd gem-dvd

http://claudiusmaximus.goto10.org/index.php?page=gallery/tutorials/gem-dvd

Any/all feedback appreciated!

Future plans include adding Pd-generated sound, proper anti-aliasing of the video, more interesting video, and better documentation (let me know what is lacking).

Claude

http://claudiusmaximus.goto10.org