AnsweredAssumed Answered

Poor framerates on iMX6 Solo when decoding H264

Question asked by ralph__ on Oct 9, 2014
Latest reply on Dec 4, 2014 by igorpadykov

I'm using gstreamer to playback some H264 videos - one is 720p60 and one is 1080p30. The framerates are much worse than expected (the iMX can do 1080p30 and 720p60 allegedly....) and I am certain the hardware is doing the decoding as it only has 1-2% CPU utilisation.


Here are the commands I run to test the video. Either:


gst-launch-0.10 filesrc location=/usr/sample.mp4 ! qtdemux ! vpudec ! mfw_isink




gplay /usr/sample.mp4


Both lines give me the same end result which is this:


1080p30 clip runs at 23fps (reported)

720p60 clip runs at 27fps (reported)


Why are the clips running so slowly? If I play back either clip in VLC on Windows the framerates are as expected; i.e. 30fps for the 1080p30 and 60fps for the 1080p60.

Thanks for your help,