[GEM-dev] [pix_film] issues on linux

[Roman Haefeli]

hi all

there was a thread these days on pdmtl mailing list about how to encode
movie files, so that they can be easily read by [pix_film]. it turned
out that this is not an easy task at all. some reported crashes, when
loading movie-files. here on my computer i can load most of the files,
though cpu goes up to 100%, when turning rendering on, even when
displaying constantly the same frame. cpu goes down, when rendering is
turned off again.

the only movie i found, that was working without issues, is 'anim-1.mov'
that is shipped with gem. but also the other movie-files from the
data-folder eat my cpu, when loaded. 

i tried to locate the problem by compiling gem with support only for
certain libraries instead of all. but any mjpeg/mov file i tried was
eating my cpu, no matter if it was loaded by libquicktime or by ffmpeg
(btw: is there a better way to force a certain library to use instead of
compiling gem with support only for one library?).

in any tests i did, i didn't encounter any errors in pd-window.

i'd like document these issues a bit better in order to provide you
detailed and usefull information. though i am actually uncertain, what
is the best way to do that, since there are so many variables like
different libraries, different versions of these libraries, different
codecs/formats, even movies with the same format/coded behave completely
different sometimes. any hint on that is much appreciated.

also i'd like to know, if [pix_film] is working well, what libraries
have you enabled, what versions of this, how to you encode movies to be
played by [pix_film].

cheers
roman




		
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