topic Re: i.MX6Q Android Camera frame rate issue in i.MX Processors

i.MX6Q Android Camera frame rate issue

powerprince — Fri, 28 Nov 2014 11:28:17 GMT

When I useing the camera data transfer function to Android Camera App,
Camera frame rate is very low frame rate approximately from 18 to 19 frames.

But , When I test default Android Camera app I can see 30fps.

For Our camera App I used function Camera.setPreviewCallbackWithBuffer() of Android API

For this issue, I attached analysis log file.
In brief, I guess data delay when I send the camera data using RequestManager::handleRequest() function to camea applicatoin.
(Hardware/imx/mx6/libcamera2/ RequestManager.cpp)

Pls, comment helpful for resolve this problem.

at Camera Preview (30fps)

(1) & (2) Is constant in 33ms intervals."acquireCameraFrame():systemTime"

(3) & (4) log print time is also constant intervals of 30 or 40ms.

(5) start to completed request time is 30ms constant intervals.

When using Callback function.(under 19fps)

Camera.setPreviewCallbackWithBuffer()

(1) is not constant time value(acquireCameraFrame():systemTime)

(2) is not constant log print time

(3) start to completed request time is not constant intervals(30ms~60ms).

Re: i.MX6Q Android Camera frame rate issue

weidong_sun — Tue, 02 Dec 2014 04:18:20 GMT

Hello ryan,

According to your description, the issue should be loacated at Camera App you designed, because default Camera App in android can get normal frame rate, so please check the source code of your application carefully !

Regards,

Weidong

Re: i.MX6Q Android Camera frame rate issue

wenmin — Wed, 21 Jan 2015 07:04:46 GMT

Hello Weidong,

I got the same problem, I.MX6Q Android Camera Can't Get 30Fps preview data. if we set Camera.setPreviewCallbackWithBuffer or Camera.setPreviewCallback to the camera, and do nothing with the preview back onPreviewFrame(byte[] data, Camera camera),

we can only got under 19fps preview data. if the video resolution is 1080P，we just got under 8fps preview data.

Pls, comment helpful for resolve this problem

Re: i.MX6Q Android Camera frame rate issue

saurabh206 — Wed, 21 Jan 2015 08:09:11 GMT

Hi,

Wen

Which camera are you using ? USB camera?

Re: i.MX6Q Android Camera frame rate issue

wenmin — Wed, 21 Jan 2015 09:29:46 GMT

hi, saurabh

I'm use the mipi to camera