Differences

This shows you the differences between two versions of the page.

--- doc:appunti:hardware:sjcam-8pro [2022/05/05 06:16] – niccolo
+++ doc:appunti:hardware:sjcam-8pro [2022/06/14 08:59] – [Color profiles] niccolo
@@ Line 3: / Line 3: @@
 The **SJCAM SJ8 Pro** action camera was introduced in **2018**, it features **4k video** at **60 fps** and **gyroscope image stabilization**. I purchaesd it in 2021 to work alongside my old [[xiaomi_yi|Xiaomi Yi]], mainly because I was interested in image stabilization.
-{{.:sjcam:sjcam-sj8pro-backpack-mount.jpg?direct&640|The SJCAM SJ8 Pro mounted on the shoulder strap of a backpack}}
+{{.:sjcam:sjcam-sj8pro-backpack-mount.jpg?direct&600|The SJCAM SJ8 Pro mounted on the shoulder strap of a backpack}}
 Unfortunately SJCAM does not support this camera very much: the latest **firmware upgrade** is from September 2020, despite there are some evident bugs and several aspects of the user interface which should be improved. Thirdy part support is poor: there is no **waterproof case** except the original one, which unfortunately has a plastic window. There is not much documentation about **customizing the firmware** or scripting using the **Ambarella Scripting**.
 See also my other page about this camera: **[[sjcam-8pro-ambarella-firmware-modding]]**, **[[sjcam-8pro-ambarella-wifi-api]]** and **[[sjcam-8pro-custom-firmware]]**.
+===== Specs, Pros and Cons =====
 **Pros**
@@ Line 125: / Line 127: @@
 {{.:sjcam:color-profile-flat.jpg?direct&400|Color Profile Flat}}
-You can edit the color profiles using the BitrateEditor software. But be careful that the profile selected at bootstrap is neither //SJCAM - Vivid// nor //Flat//, but another one stored in some other part of the firmware that I was unable to locate.
+You can edit the color profiles using the BitrateEditor software. Be careful that the profile selected at bootstrap is neither //SJCAM - Vivid// nor //Flat//, but the one named //Default// by BitrateEditor (starting from version 10.7 - Nov 3, 2021).
 ==== Flat vs SJCAM - Vivid ====
@@ Line 263: / Line 265: @@
 There are many hackers who produce modified versions of the original firmware. In general they distribute the original firmware patched in several places, mainly to customize framerates, exposure parameters, etc.
+I created a custom firmware to improve some video codec settings and to improve image quality (mainly color balance and saturation). You can find it here: **[[sjcam-8pro-custom-firmware]]**.
 Generally there is **no access to the source code**, so **patching the firmware binary** is a rather delicate task, requiring to know the exact offset of the data into that **specific version of the firmware**, the structure and the lenght of the data and eventually how to **update the embedded checksums**. SJCAM does not facilitate the task, because it distribute different versions of the firmares marked with the same version number.
@@ Line 641: / Line 645: @@
 ===== The TCP API =====
-See the page **[[sjcam-8pro-api]]** about the programming interface (API) offered by the SJCAM SJ8 Pro over the WiFi connection or even in localhost. The interface is offered on port **TCP/7878**.
+See the page **[[sjcam-8pro-ambarella-wifi-api]]** about the programming interface (API) offered by the SJCAM SJ8 Pro over the WiFi connection or even in localhost. The interface is offered on port **TCP/7878**.
 The interface is based on **JSON messages**: you can exchange them over the WiFi connection as the official app **[[https://play.google.com/store/apps/details?id=org.jght.sjcam.zone|SJCAM Zone]]** does between the Android device and the camera. You can also **connect a PC** to the camera via WiFi and use any programming language supporting TCP sockets.