Screen recording when two user connect on call in app iOS

[adnanatif]

I try to record the screen when two users connect on a call in the app. But it does not work.
When I save a video it saves with zero bytes.
It works well on Android but on ios it does not.
Any help would be appreciated thanks

error:

flutter: exception [mov,mp4,m4a,3gp,3g2,mj2 @ 0x12aa3f570] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible!
flutter: exception [mov,mp4,m4a,3gp,3g2,mj2 @ 0x12aa3f570] moov atom not found
flutter: exception /var/mobile/Containers/Data/Application/95478295-C552-472E-A5FC-D48B1AC76D4A/Documents/OorKti265dPQwToO.mp4: Invalid data found when processing input

[adigujjar]

assetWriter.error: Optional("Optional(Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-12780), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x2830cdcb0 {Error Domain=NSOSStatusErrorDomain Code=-12780 "(null)"}})")
self.videoWriter?.status false