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--- doc:appunti:hardware:raspberrypi_micromediahub [2017/12/28 23:15] – [Starting Kodi at Boot] niccolo
+++ doc:appunti:hardware:raspberrypi_micromediahub [2020/09/28 20:45] (current) – [Kodi] niccolo
@@ Line 9: / Line 9: @@
   * Joystick controller
   * LCD display 16x2 charaters
+====== Current consumption ======
+See **[[https://www.raspberrypi.org/documentation/faqs/#powerReqs|FAQS PowerReqs]]**.
+  * **Raspberry Pi 3 Model B**
+    * 1GB RAM
+    * Typical bare-board active current consumption: 400mA
+    * Maximum total USB peripheral current draw: 1.2A
+    * Recommended PSU current capacity: 2.5A
+  * **Raspberry Pi 3 Model A+**
+    * 512MB LPDDR2 SDRAM
+    * Typical bare-board active current consumption: 350mA
+    * Maximum total USB peripheral current draw: Limited by PSU, board, and connector ratings only.
+  * **Toshiba Canvio Basics 1Tb**
+    * USB bus power (max. 900mA)
 ====== Kodi ======
@@ Line 20: / Line 36: @@
 Kodi will not start automatically at boot, just execute **kodi-standalone** from the command line.
-**NOTICE**: Raspbian includes **Kodi version 17.6** whereas Debian Stretch has Kodi 17.1, so beware of what packages you are installing and respect the right dependencies.
+**NOTICE**: Raspbian based on **Debian Stretch 9.11** uses two repositories:
+  * **[[http://raspbian.raspberrypi.org/raspbian/]]** (by file /etc/apt/sources.list)
+  * **[[http://archive.raspberrypi.org/debian/]]** (by file /etc/apt/sources.list.d/raspi.list)
+The first repository provides **Kodi 17.1** as per Debian Stretch. The second repository provided **Kodi version 17.6** on December 2017, but it was upgraded to **Kodi version 18** on february 2019. So beware of what packages you are installing, respect the right dependencies and be carefull with upgrades.
+Our current installation uses these versions:
+^ kodi                         | 2:17.6-2~stretch  |
+^ kodi-bin                     | 2:17.6-2~stretch  |
+^ kodi-eventclients-common     | 2:18.1-1~stretch  |
+^ kodi-eventclients-kodi-send  | 2:18.1-1~stretch  |
+^ kodi-peripheral-joystick     | 1.3.4-1~stretch   |
+^ libkodiplatform17:armhf      | 17.4.0~stretch    |
+To activate a joypad you have to go through **//Settings//** => //System settings// => //Input// => **//Configure attacched controllers//**.
 ===== Starting Kodi at Boot =====
@@ Line 92: / Line 123: @@
 </file>
+===== Problem Decoding Webm (VP8 Encoded) Videos =====
+We got a severe problem trying to play some **.webm** video files: the audio starts but it freeze shortly, the video does not start at all. After that, all the Kodi interface was frozen and we need to reboot (ssh access still working). Into kodi.log we get the following error:
+<code>
+CMMALVideo::Open Failed to commit format for decoder
+    input port vc.ril.video_decode:in:0(VP8 ) (status=3 EINVAL)
+</code>
+To confirm that the video codec is VP8, we installed the **mediainfo** package an run the tool against the video; which actually uses the VP8 codec. The official **[[http://kodi.wiki/view/Raspberry_Pi_FAQ|Kodi Wiki]]** says that VP8 is supported on the Raspberry Pi architecture, so we are searching for the problem somewhere else.
+**[[https://forum.kodi.tv/showthread.php?tid=204239|This post]]** says that VP8 hardware (GPU) decoding is supported only if firmware **start_x.elf** is loaded: //Note that GPU accelerated software codecs (and camera) are only available from start_x.elf. Add start_x=1 to config.txt (or use raspi-config and enable camera)//. This means that we have to add the following line in **/boot/config.txt** (The required file is already in the ''/boot'' directory):
+<file>
+start_x=1
+</file>
+See also the page **[[https://www.raspberrypi.org/documentation/configuration/config-txt/boot.md|Boot options in config.txt]]**. We have also **gpu_mem=128** in the same config file.
 ===== Starting Kodi only if USB hard disk is present =====