Android Fire TV Stick Gen 2 - H.265 playback
#1
Hi all,

I bought a Fire TV Stick (Gen 2) and installed Kodi onto it, but the H.265 playback is not smooth at all, although the hardware spec says it supports H.265 naively. Any ideas?

The hardware spec: https://developer.amazon.com/public/solu...ifications

H.265 (HEVC) video/mp4 Hardware accelerated up to 1080p @ 30fps, 25 Mbps, Main Profile Level 4.0, Color space 8-bit support

Thanks!
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#2
Download the Mediainfo PC / Mac program and interrogate problem H.265 files Metadata.

This could either be related to the 23.976fps video playback Firmware bug or you are trying to playback 1080p 10bit (Main10) H.265 files.

The FireTV2 should be able to decode 10bit H.265 - 23.976fps playback may be a different story.

Either way I would use the Stick for Android Apps only. Get something that fully supports Kodi and all audio & video compression formats for trouble free Kodi use.

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#3
Thanks for the quick reply! I download mediainfo and here is the detailed media info:

General
Unique ID : 113689581043176519375663581000522482864 (0x5587D11D0DFFD61D2B9A0EEEE9B344B0)
Complete name : **.mkv
Format : Matroska
Format version : Version 2
File size : 7.50 GiB
Duration : 3h 3mn
Overall bit rate : 5 861 Kbps
Movie name : **
Writing application : HandBrake 0.10.1 2015030800
Writing library : Lavf55.12.0 / Lavf55.12.0

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : [email protected]@Main
Codec ID : V_MPEGH/ISO/HEVC
Duration : 3h 3mn
Width : 1 912 pixels
Height : 804 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Writing library : x265 1.5:[Linux][GCC 4.8.2][64 bit]
Encoding settings : wpp / ctu=64 / tu-intra-depth=1 / tu-inter-depth=1 / me=1 / subme=2 / merange=57 / no-rect / no-amp / max-merge=2 / temporal-mvp / no-early-skip / no-fast-cbf / rdpenalty=0 / no-tskip / no-tskip-fast / strong-intra-smoothing / no-lossless / no-cu-lossless / no-constrained-intra / no-fast-intra / open-gop / interlace=0 / keyint=240 / min-keyint=24 / scenecut=40 / rc-lookahead=20 / bframes=4 / bframe-bias=0 / b-adapt=2 / ref=3 / weightp / no-weightb / aq-mode=1 / aq-strength=1.00 / cbqpoffs=0 / crqpoffs=0 / rd=3 / psy-rd=0.30 / psy-rdoq=0.00 / signhide / lft / sao / no-sao-non-deblock / b-pyramid / cutree / rc=crf / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=51 / qpstep=4 / ipratio=1.40 / pbratio=1.30
Default : Yes
Forced : No
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 3h 3mn
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Frame rate : 46.875 fps (1024 spf)
Compression mode : Lossy
Delay relative to video : -21ms
Title : Surround
Language : English
Default : Yes
Forced : No


What happened to 23.976fps?
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#4
Quote:Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : [email protected]@Main
....
Bit depth : 8 bits

This 8bit should decode fine, smooth playback might be a different story:

Fire TV new Firmware 5.2.4.1 - 24p playback stuttering

You may even need to mod Kodi's Video Cache's:
http://kodi.wiki/view/HOW-TO%3AModify_the_video_cache

It could be the WiFi being used....

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#5
Thanks. Let me look into these...
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#6
using latest version i have no problems with 1080p 8bit HEVC on a gen 2 stick.
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#7
(2017-06-07, 22:39)honcho Wrote: using latest version i have no problems with 1080p 8bit HEVC on a gen 2 stick.

This is what I was looking/ hoping for. Could it possible be made to do 10 bit HEVC files while ignoring 2 bit (that was performance is not hit)?
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#8
According to this chart - No.

Media Specifications (Amazon Fire TV Stick, Gen 2)

You need a Fire TV2 box (Gen2) or a new 4K HDR FireTV (Gen3) for 10bit HEVC Hardware decoding.

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#9
Is there an official guide to install Kodi on this?
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#10
With Kodi 18 the firetv doesn't switch to 24p anymore. Any solution?
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