Re: [Mlt-devel] Consumer avformat JPEG question

[Jonathan T. <jon...@gm...>]

Dan,
Thanks for the example code.  It worked great.  There were 2 differences in
my code ... compared to the example you provided.

1) I had *c.set( "rescale", "none" )*, which seems to cause the crazy
garbled image (or green bars across the bottom of the image)
2) I used *c.start()* instead of *c.run()*
    - I haven't researched the difference between those 2 methods yet...

Anyway, I now have a generic thumb-nailer working with all of my test video
clips, and it seems very stable now!

Thanks for your help, as usual!
-Jonathan


On Thu, Apr 2, 2009 at 12:53 AM, Dan Dennedy <da...@de...> wrote:

> On Wed, Apr 1, 2009 at 7:45 PM, Jonathan Thomas
> <jon...@gm...> wrote:
> > Thanks for the response.  I will take a look at the thumb-nailing in
> > kdenlive.  Also, yes I am using fezzik to create the Producer.  Fezzik
> > seemed to work fine, so long as the "Profile" is set correctly.  But if
> the
> > profile doesn't match the video resolution / aspect ratio, then really
> bad
> > things happen (i.e. garbled images) when I use an "avformat" consumer
> > (specifcally when exporting to JPEG).  Do you think this is a MLT bug? or
> > FFMPEG bug?
>
> this works for me:
>
> #!/usr/bin/env python
>
> import mltpp
> import sys
>
> mltpp.Factory().init()
> profile = mltpp.Profile("quarter_ntsc")
> producer = mltpp.Producer(profile, sys.argv[1])
> producer = producer.cut(int(sys.argv[2]), int(sys.argv[2]))
> consumer = mltpp.Consumer(profile, "avformat", sys.argv[3])
> consumer.set("real_time", 0)
> consumer.set("progressive", 1)
> consumer.connect(producer)
> consumer.run()
>
> --eof--
>
> sys.argv[2] should contain the frame number of what you want to create.
> If you want to get more than one thumbnail, then create a playlist and
> instead of producer.cut, do playlist.append for each frame you want,
> and put a %d in the output filename in sys.argv[3].
>
> --
> +-DRD-+
>