Is there any way to restrict the duration of output of AVAssetWriter in iOS?
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I'm capturing video/audio samples using ReplayKit apis. Below is the snippet for capturing screen frames
recorder.startCapture(handler: {
(cmSampleBuffer, rpSampleBufferType, error) in
AssetWriter.shared.write(buffer: cmSampleBuffer, bufferType: rpSampleBufferType)
}, completionHandler: {
(error) in
if let error = error {
self.isCapturing = false
NSLog("Error in capturing screens: (error.localizedDescription)")
} else {
self.isCapturing = true
NSLog("Capturing started successfully.")
}
self.updateViewButtons()
})
and converting those cmSampleBuffers using AVAssetWriter to a movie file, but I want to restrict the size of movie file say 1 min if it goes beyond then it capture last 1 min only.
avfoundation replaykit
asked Jan 4 at 4:52
umeshumesh
286134
add a comment |
I'm capturing video/audio samples using ReplayKit apis. Below is the snippet for capturing screen frames
recorder.startCapture(handler: {
(cmSampleBuffer, rpSampleBufferType, error) in
AssetWriter.shared.write(buffer: cmSampleBuffer, bufferType: rpSampleBufferType)
}, completionHandler: {
(error) in
if let error = error {
self.isCapturing = false
NSLog("Error in capturing screens: (error.localizedDescription)")
} else {
self.isCapturing = true
NSLog("Capturing started successfully.")
}
self.updateViewButtons()
})
and converting those cmSampleBuffers using AVAssetWriter to a movie file, but I want to restrict the size of movie file say 1 min if it goes beyond then it capture last 1 min only.
avfoundation replaykit
asked Jan 4 at 4:52
umeshumesh
286134
add a comment |
I'm capturing video/audio samples using ReplayKit apis. Below is the snippet for capturing screen frames
recorder.startCapture(handler: {
(cmSampleBuffer, rpSampleBufferType, error) in
AssetWriter.shared.write(buffer: cmSampleBuffer, bufferType: rpSampleBufferType)
}, completionHandler: {
(error) in
if let error = error {
self.isCapturing = false
NSLog("Error in capturing screens: (error.localizedDescription)")
} else {
self.isCapturing = true
NSLog("Capturing started successfully.")
}
self.updateViewButtons()
})
and converting those cmSampleBuffers using AVAssetWriter to a movie file, but I want to restrict the size of movie file say 1 min if it goes beyond then it capture last 1 min only.
avfoundation replaykit
asked Jan 4 at 4:52
umeshumesh
286134
I'm capturing video/audio samples using ReplayKit apis. Below is the snippet for capturing screen frames
recorder.startCapture(handler: {
(cmSampleBuffer, rpSampleBufferType, error) in
AssetWriter.shared.write(buffer: cmSampleBuffer, bufferType: rpSampleBufferType)
}, completionHandler: {
(error) in
if let error = error {
self.isCapturing = false
NSLog("Error in capturing screens: (error.localizedDescription)")
} else {
self.isCapturing = true
NSLog("Capturing started successfully.")
}
self.updateViewButtons()
})
and converting those cmSampleBuffers using AVAssetWriter to a movie file, but I want to restrict the size of movie file say 1 min if it goes beyond then it capture last 1 min only.
avfoundation replaykit
avfoundation replaykit
asked Jan 4 at 4:52
umeshumesh
286134
asked Jan 4 at 4:52
umeshumesh
286134
asked Jan 4 at 4:52
umeshumesh
286134
asked Jan 4 at 4:52
umeshumesh
286134
asked Jan 4 at 4:52
umeshumesh
286134
286134
add a comment |
add a comment |
1 Answer
1
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oldest
votes
The tricky part is 'keeping the last 1min only'; to my knowledge, there is no easy way to do this. So your best bet will probably be something like:
- while recording, start a new AVAssetWriter each minute, and keep just the current and the previous recording around
- when recording is finished and it comes to assembling that 'last 1 minute'
- open the previous and current recording as
AVAssets
- insert time ranges from these into a new
AVMutableCompositionso that they result in this last 1 minute of recording - export the composition with an
AVAssetExportSessionto the final movie (using the passthrough preset will spare you the overhead/quality loss of re-encoding)
- open the previous and current recording as
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The tricky part is 'keeping the last 1min only'; to my knowledge, there is no easy way to do this. So your best bet will probably be something like:
- while recording, start a new AVAssetWriter each minute, and keep just the current and the previous recording around
- when recording is finished and it comes to assembling that 'last 1 minute'
- open the previous and current recording as
AVAssets
- insert time ranges from these into a new
AVMutableCompositionso that they result in this last 1 minute of recording - export the composition with an
AVAssetExportSessionto the final movie (using the passthrough preset will spare you the overhead/quality loss of re-encoding)
- open the previous and current recording as
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
add a comment |
The tricky part is 'keeping the last 1min only'; to my knowledge, there is no easy way to do this. So your best bet will probably be something like:
- while recording, start a new AVAssetWriter each minute, and keep just the current and the previous recording around
- when recording is finished and it comes to assembling that 'last 1 minute'
- open the previous and current recording as
AVAssets
- insert time ranges from these into a new
AVMutableCompositionso that they result in this last 1 minute of recording - export the composition with an
AVAssetExportSessionto the final movie (using the passthrough preset will spare you the overhead/quality loss of re-encoding)
- open the previous and current recording as
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
add a comment |
The tricky part is 'keeping the last 1min only'; to my knowledge, there is no easy way to do this. So your best bet will probably be something like:
- while recording, start a new AVAssetWriter each minute, and keep just the current and the previous recording around
- when recording is finished and it comes to assembling that 'last 1 minute'
- open the previous and current recording as
AVAssets
- insert time ranges from these into a new
AVMutableCompositionso that they result in this last 1 minute of recording - export the composition with an
AVAssetExportSessionto the final movie (using the passthrough preset will spare you the overhead/quality loss of re-encoding)
- open the previous and current recording as
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
The tricky part is 'keeping the last 1min only'; to my knowledge, there is no easy way to do this. So your best bet will probably be something like:
- while recording, start a new AVAssetWriter each minute, and keep just the current and the previous recording around
- when recording is finished and it comes to assembling that 'last 1 minute'
- open the previous and current recording as
AVAssets
- insert time ranges from these into a new
AVMutableCompositionso that they result in this last 1 minute of recording - export the composition with an
AVAssetExportSessionto the final movie (using the passthrough preset will spare you the overhead/quality loss of re-encoding)
- open the previous and current recording as
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
edited Jan 7 at 19:24
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
answered Jan 4 at 12:38
NoHalfBitsNoHalfBits
421125
421125
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
add a comment |
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
Thank you for the pointer :)
– umesh
Jan 7 at 17:42
add a comment |
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