Video decoder engine

I would like to know if my Jetson TX2 uses the hardware decoding. I have seen in many forums that the right thing to do is to call sudo ./tegrastats. However, if I do so, the output is:

RAM 2111/7851MB (lfb 1062x4MB) cpu [8%@498,2%@345,1%@345,3%@499,5%@499,8%@500] EMC 4%@665 APE 150 GR3D 0%@114

As you can see there is no info about video decoding acceleration.
My questions are:

  • how can I get info about video decoding acceleration?
  • what is the APE info that I get when calling tegrastats?

Looks surprising. Which L4T release are you running ?

head -1 /etc/nv_tegra_release

For reference, I get this kind of output:

RAM 1532/7853MB (lfb 1307x4MB) cpu [0%@1483,off,off,0%@1487,0%@1487,0%@1481] EMC 0%@1600 APE 150 VDE 1203 GR3D 5%@140

EMC – memory controller
AVP – audio/video processor on TK1 - Not sure what exactly means APE
VDE – video decoder engine

The output of

head -l /etc/nv_tegra_release


# R28 (release), REVISION: 0.0, GCID: 8997125, BOARD: t186ref, EABI: aarch64, DATE: Fri May 12 22:53:35 UTC 2017

Do I have a somehow wrong version of L4T?

I am not aware of an officially released R28.
I’ve seen posts mentioning a problem with nvidia server proposing JetPack3.1, quickly fixed but it has stayed in cache in China for longer time.
You may find some posts in this forum about one week ago about this problem.

I would suggest to reflash a R27.1 from JetPack3.0, but I am not sure at all.
Probably someone else with better knowledge or from NVIDIA would confirm or not.

This may have been from that short time when the servers were misconfigured and JetPack was version 3.1. Is your JetPack version 3.1? If so, then this was an incomplete download and wasn’t ready for release…you’ll need to delete that and download again if it shows as JetPack 3.1. Somewhere on the forums I think there was a rough estimate that the next release (presumably 3.1 on JetPack or R28 on L4T) would be in July, so there shouldn’t be too long of a wait for a future version.

Thanks. I will flash the Jetson using JetPack 3.0.