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--- doc:appunti:hardware:raspberrypi_nas [2021/03/22 09:34] – [Home Mediacenter and NAS with the Raspberry Pi] niccolo
+++ doc:appunti:hardware:raspberrypi_nas [2021/03/31 15:13] – [Home Mediacenter and NAS with the Raspberry Pi] niccolo
@@ Line 12: / Line 12: @@
 {{.:raspberrypi:wifi-forbidden.png?90 |WiFi Warning}}
-**WARNING** :!: I cannot recommend this solution at all! It turned out that the Raspberry Pi, when it uses the **USB 3** interface, produces **radio interferences on the 2.4 GHz** band. It is **impossibile to connect to the 2.4 GHz WiFi** access point which is only 5 meters far. It was also **impossible to use a wireless keyboard and mouse**, using one USB dongle which also operates on the 2.4 GHz. To operate a **wireless gamepad** (which also uses an USB dongle on the 2.4 GHz frequencies) I had to distantiate the dongle from the Raspberry Pi using and USB **extension cable of about 0.5 meters**.
+**WARNING** :!: It turned out that the **Raspberry Pi 4**, when it uses the **USB 3** interface, produces **radio interferences on the 2.4 GHz** band. It is **impossibile to connect to the 2.4 GHz WiFi** access point which is only 5 meters far. It was also **impossible to use a wireless keyboard and mouse**, using one USB dongle which also operates on the 2.4 GHz. To operate a **wireless gamepad** (which also uses an USB dongle on the 2.4 GHz frequencies) I had to distantiate the dongle from the Raspberry Pi using and USB **extension cable of about 0.5 meters**. Due this **severe problem**, I can suggest the RPi4 solution only if you will use the **Ethernet** interface or an access point on the **5 Ghz** band. As an alternative to the wireless gamepad or keyboard, you can use the **[[https://play.google.com/store/apps/details?id=org.leetzone.android.yatsewidgetfree|Yatse application]]** on an Android smartphone.
-Due this **severe problem**, I can suggest this solution only if you will use the **Ethernet** interface or an access point on the **5 Ghz** band. As an alternative to the wireless gamepad or keyboard, you can use the **[[https://play.google.com/store/apps/details?id=org.leetzone.android.yatsewidgetfree|Yatse application]]** on an Android smartphone.
+{{.:raspberrypi:forbidden-mpg4.png?90 |MPEG4 Warning}}
+**WARNING** :!: There is another potential problem with the **Raspberry Pi 4**: due the increased CPU power, the designers decided to drop the **H263** and **MPG4** codecs from the hardware. That codecs were enabled in-hardware into the older Raspberry Pi models and the license price were included into the hardware price. In older models you could also purchase additional licenses, e.g. for **MPEG2** and **VC-1**; this is no longer an option on the Raspberry Pi 4. My experience is not satisfying with sofware decoding of MPEG4 streams (e.g. some produced by the XviD library): whereas the LibreELEC distribution is smooth enough, the RaspiOS one produces **unacceptable jerky video playback**.
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