SWF files are unsupported

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The picture shows that SWF files do not work with currently (pink text).

I'm not too familiar with SWF files, so I need someone who knows what they're talking about to help.

SWF are programs. They may contain programs that generate video through animations and contain audio, in which case it would be useful to detect duplicates. But, they need to be in a format that can generate frames in order to perceptually hash. Additionally, I think a lot of these SWF's that contain animations require going through a menu to access the video AKA interactive files so that's another issue.

Is there a way to generate video from non-interactive SWF's so that they can be perceptually hashed? Preferably with FFmpeg. I'm fine with adding optional dependencies if users want this, but I don't even know where to start.

Slightly related to Flash: I tested videos with FLV and F4V containers and they work. I tested FLV with FSV1, FSV2, and FLV1. F4V only supports H.264 and it works.