Saving and segmenting video from a video camera stream in Flutter - flutter

I need to create a small MVP application that will work like a video recorder. The video in it should be segmented on the phone and sent to the server in parts. Is it possible to implement something similar in Flutter? And if there are ready-made libraries that allow you to segment the video stream, I will be grateful for the recommendations.

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How to broadcast media files on monitor screen?

I need help. I can’t figure out how to write a mini application on Flutter where video files and pictures are broadcasted on the monitor screen. It should look like a photo frame with video files. Do you have any ideas how to implement this?
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Video Stream of NSView

I want to create a video stream of a View in iOS. For example place a View in iPhone and draw something on it and I want to create a video stream (H.264 or MP4 or any famous standard) so that I can save a video file which contain recording of my NSView and all drawing and other operations that I perform.
Any idea where to start? Is there some API available in iOS to record video iPhone screen or a specific view??
Thanks in advance.
This blog post contains a link to sample project that shows how to capture screen content on iOS and add it to an AVFoundation asset.
Download the sample project called VTMScreenRecorderTest.zip
Also take a look on the slides (the screen capture part starts at slide 44).
The capture code is based on Apple's Technical Q&A 1703.

iphone screen recording with audio

I want to record the activities of my app as a video with sound.
I am able to do this with AVAssetWriter and AVAssetWriterInput. Actually I am rendering a view's layer to a gaphicscontext and then use this rendered image to make a video file.
But I am not able to add audio to this video file. I want to add sounds that My app produced to this Video File.
How can I implement this using objective c

Graphical Audio player in iOS

Is there a library or built in graphical player to represent a playing audio file in iOS.
I dont want a full screen player, but a small inline player that can be embedded into a UIView.
Does this exist in iOS?
Apple has a good example of this, avTouch. I have successfully adapted parts of their code to display audio levels in the past.
avTouch