How to deliver slowly changing still images as an FLV stream?

I'm thinking about a Django application (Django is a Python Web framework) would run on a Linux server, which would be delivering an occasionally changing still image as an FLV (Flash Video) stream to the clients' browsers. The image is changing smoothly, but delivering a key frame from time to time is not a problem. I've already conducted some research and not sure which solution would be the best here.

How can I deliver an FLV stream in Django or on Linux in general in a way which would allow for changing the underlayi开发者_运维知识库ng frame from time to time?

The solution does not have to be in Python, but has to run on Linux. A combination of command line tools and Python is also possible, it does not have to be a high throughput solution.