IMX8MQ EVK 4K 60fps decode not smooth

[cmjanik]

4K 60fps mp4 decode on the i.MX 8M QUAD EVK is very choppy. Its clearly not decoding correctly. I would appreciate help getting this to decode smoothly.

System and media details are as follows:

i.MX 8M QUAD EVK

setup is out of the box Android

decode executed with mp4 file located on both a USB drive and on the onboard media

Media Info shows following mp4 file spec:

format: AVC

profile: main@L5.2

bitrate: 37.3 Mb/s

height: 3840

width: 2160

framerate: 60.000 fps

color space: YUV

chroma subsampling: 4.2.0

bit depth: 8 bits

[joanxie]

what android version do you use？ refer to the android release note:

To support 4K HDR video playback, the CMA size is set to 1536 MB by
default. Change cma=1280M in bootargs when measuring the benchmark
performance.

 pls try to check this

[cmjanik]

What Android release note? Please specify a document.

Android Version and kernel version:

From the About tablet screen on the EVK:

Model: EVK_8MQ

Android version: 8.0.0

Android security patch level: November 5, 2017

Kernel version:

   4.9.68

   bamboo@shlinux23 #1

   Wed Jan 24 01:21:33 CST 2018

Build number:

evk_8mq-userdebug 8.0.0 1.3.0-prc-rc2 20180110 dev-keys

Version/rev of the board:

SCH-29615 REV B3 (sticker on bottom of EVK) 

Video of the “choppy” video displayed:

Noah4K60420 original video shot with an iPhone 8 (suggest play 1080p or 720p)

Noah4K60420 IMX8MQ-EVK screen shot video playback on i.MX8MQ-EVK

[joanxie]

for release note, pls find the attachment, you can try to test as release note says, I got information from android team, 8.1.8mm beta includes all of fix, but we haven't released it public, you need to wait or contact local representative to get sample first if you have this right

[FrankRamirez]

Hi cmjanik@gmail.com,

The Beta version was just released this weekend.

Please take a look and give it a try as suggested.

Alpha / Beta BSPs for Microprocessors|NXP 

Frank