Pulling hundreds of monitoring channels at the same time, the output results do not match

Thanks for your reply. I set up ‘streammux.set_property(‘batched-push-timeout’, 1000000 / 25)’ as suggested by your link, but the output number is still inconsistent with the access number. For example, the fps of the camera is 25, The i-frame is 50. I want to read only the key frame output. If I want to output the results of 100 cameras in one batch, what should this attribute be set to?