Request: produce image file (thumb) of the frame with the highest amount of motion per output video about dvr-scan HOT 3 OPEN

Curiosity got the better of me and I hacked up a test of this feature. I didn't handle the comp_file thing and I wasn't sure about some of the frame copying, but basically I added a _highscore and a _highframe and when a motion event is closed up I dump the frame with cv2.imwrite.

It seems to work really well for my test cases. Mark-I Eyeball efficiency went up like 500%.

Other possibly useful things:

• printing the high score per event seems kind of helpful for tuning thresholds
• another vote for get_output_path

from dvr-scan.

This is a great idea!

Curiosity got the better of me and I hacked up a test of this feature. I didn't handle the comp_file thing and I wasn't sure about some of the frame copying, but basically I added a _highscore and a _highframe and when a motion event is closed up I dump the frame with cv2.imwrite.

That sounds like a reasonable approach to me. Feel free to push a PR to the develop branch if you would like. In the meantime will keep this open since this sounds like a great feature to have for a CLI tool like this.

from dvr-scan.

When looking at the feature I kinda realized it gets a little more complicated, particularly with the awkward combination of options available. i.e. bounding box doesn't make sense with ffmpeg as the output… unless you want bounding boxes in the thumbnails for your ffmpeg produced output.

At the risk of becoming too ffmpeg-like in complexity, it seems like some sort of output chain would serve implementing stuff like this. Like every time a motion event is closed up, it's just packaged up with its frame list and scores and sent down a chain of processors. One processor in the chain could be the video encoder output, and another might be a thumbnail producer.

I'm also sure someone will want some other variant of a thumbnail other than just the high scorer.

(And my end goal is actually to also feed a motion group to AI straight within python.)

Just something I thought about. If I make a reasonably crude-but-unobtrusive version of the thumb feature I'll send a PR.

Thanks!

from dvr-scan.