DepthAI encoding and recording interruption

Letty

I have a general question about the H265 encoding done by DepthAi. I'm interested to find out how does it work so that it is possible to save a .h265 file and interrupt a recording abruptly (even unplugging the camera or turning off the host machine) and still be able to convert it to a playable file. Is it using a feature that is available in Python, ffmpeg or something else? I'm asking since generally when recording an mp4 file if the recording process is interrupted abruptly then the file is not playable and needs to be restored in some non-easy way

erik

Hello Letty ,
it works because we add Keyframe after every frame. So if that wouldn't be the case, you would lose last all frames up until the last keyframe.
Thanks, Erik

Mojo

Hi @Letty
I have done some testing with the OAK-D, using this example, which opens a file using Python's builtin open function. I tried hittting Ctrl + C and simultaneously unplugging the device, and unplugging the device while the code was running. The .h265 video file was playable in both cases.

Letty

erik Thank you, that's very helpful! Is gstreamer involved in the pipeline by any chance?

erik

Hello Letty , it's currently not, but you could add it to the host side and use it to stream video somewhere else.

Letty

erik Thank you!