Process compressed video capture frame on iOS
here's my problem.
I'm working on a real-time machine learning software in which I process image returned by the camera.
I'd like to process compressed video frame instead of raw image from :
(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connecti
I tried to modify directly the input by not using AVCaptureSession sessionPreset to set manually the bitrate.
Only the changes made with the sessionPreset property actually change something.
1st question: Is it possible to have a sampleBuffer with 1280x720 resolution and 4Mb/s bitrate quality and not a specific config made with sessionPreset?
2nd question: if this is not possible, can I process at runtime compressed frame made by AVAssetWriter?
Thx for all
Polpot
ios avfoundation coreml
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
add a comment |
here's my problem.
I'm working on a real-time machine learning software in which I process image returned by the camera.
I'd like to process compressed video frame instead of raw image from :
(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connecti
I tried to modify directly the input by not using AVCaptureSession sessionPreset to set manually the bitrate.
Only the changes made with the sessionPreset property actually change something.
1st question: Is it possible to have a sampleBuffer with 1280x720 resolution and 4Mb/s bitrate quality and not a specific config made with sessionPreset?
2nd question: if this is not possible, can I process at runtime compressed frame made by AVAssetWriter?
Thx for all
Polpot
ios avfoundation coreml
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
add a comment |
here's my problem.
I'm working on a real-time machine learning software in which I process image returned by the camera.
I'd like to process compressed video frame instead of raw image from :
(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connecti
I tried to modify directly the input by not using AVCaptureSession sessionPreset to set manually the bitrate.
Only the changes made with the sessionPreset property actually change something.
1st question: Is it possible to have a sampleBuffer with 1280x720 resolution and 4Mb/s bitrate quality and not a specific config made with sessionPreset?
2nd question: if this is not possible, can I process at runtime compressed frame made by AVAssetWriter?
Thx for all
Polpot
ios avfoundation coreml
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
here's my problem.
I'm working on a real-time machine learning software in which I process image returned by the camera.
I'd like to process compressed video frame instead of raw image from :
(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connecti
I tried to modify directly the input by not using AVCaptureSession sessionPreset to set manually the bitrate.
Only the changes made with the sessionPreset property actually change something.
1st question: Is it possible to have a sampleBuffer with 1280x720 resolution and 4Mb/s bitrate quality and not a specific config made with sessionPreset?
2nd question: if this is not possible, can I process at runtime compressed frame made by AVAssetWriter?
Thx for all
Polpot
ios avfoundation coreml
ios avfoundation coreml
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
edited Nov 16 '18 at 12:22
Nicky Mattsson
2,387725
2,387725
asked Nov 16 '18 at 11:50
Cesar
111
asked Nov 16 '18 at 11:50
Cesar
111
asked Nov 16 '18 at 11:50
Cesar
111
111
add a comment |
add a comment |
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