Openelec Build for OPI PC and 2 now with HW decoding

vrm42

Hi!

I have playback issues on OPI PC. HD videos are stuttering in every couple of minutes. I tried playing them from both network and local drives.
I disabled everything from the gui, like rss, bluetooth, wifi, visual effects...

Is there any trick, tweak or hack to get the performace better or simply OPI PC is just not enough hardware for Openelec?
Thanks.

jernej

H3 and thus OPiPC is capable of 4K playback. Which image are you using? Unless it is without HW acceleration, it should work.

thc013

or wich HD content , did you tried different coded movies . or wich audio codec , like is it ac3 or aac etc

if you find it dificult to determine the codec you got mediainfo to see what the codecs are of a file

or you could play the movie in openelec en while playing press o then you got a overlay with information wich codec how many dropped frames etc .

And use a recent image of openelec older version could have the problem but is solved in recent images.

jernej

vrm42 replied at 2017-2-20 14:11
Hi!

I have playback issues on OPI PC. HD videos are stuttering in every couple of minutes. I tried  ...

Oh, if you have by any change 10 bit video, then it won't work smoothly. You can check video codec and other info by pressing "o" during playback.

jernej

PaulR replied at 2017-2-20 02:16
Would it be very hard to compile a more advanced version of ffmpeg? I thought about --enable-libx264 ...

H3 is too weak for software h265 and maybe h264 encoding. However, it has hardware support for h264 encoding, but for that you would need special version, which is not easy to prepare.

vrm42

This issue is general, I mean I tried every common formats, 720p web-dl/hdtv tv episodes, 720p/1080p scene movies with DTS, AC3.
Regardless the resolution and bitrate, all stutter all the time from both local and network storage.
With some movies the picture stops, audio continues at a point, then picture rushes.
No CPU overheat, no frame drops, cpu utilization is normal.

I got 2 OPI PC, tried both, I use latest image from jernej, OpenELEC-H3.arm-7.0-devel-20161026221506-r23113-g64b34b3-opipc.
I set up my MCE remote, installed keymap plugin, no other modification. On a j1900-based HTPC everything is fine.

So if you say video playback should be smooth I'll re-format the SD card and try the pure image without remote.

jernej

Can you make an image of the screen after you pressed "o" key? Other issues may be insufficient power supply or poor SD card. Try to change those too.

vrm42

Other PSU was the first I tried, SD card is new, decent Samsung branded, network transfer speed to SD card is around 7Mbytes/sec.
Here's the codec info: http://imgur.com/a/YV1xz
Actually this issue seems familiar to me, I had something like this on Windows when I was playing with the audio output settings years ago.
Since no frame drops, it's probably some buffering issue.

And about 4k videos: I tried a netflix rip, mass frame dropping.

jernej

Nothing strange on that info... Well, only H265 8bit 4K video can be decoded. H264 4K doesn't work. I used 2 samples during development and they worked without frame drops.

Sorry, no ideas.

vrm42

No problem, I will do some more tests tomorrow.