doc:appunti:hardware:sjcam-8pro-custom-firmware
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doc:appunti:hardware:sjcam-8pro-custom-firmware [2023/06/05 17:06] – [Bitrates GOP] niccolo | doc:appunti:hardware:sjcam-8pro-custom-firmware [2023/06/09 07:37] – [My Custom firmware] niccolo | ||
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The **SCAM SJ8 Pro** is a mid-range priced action camera, equipped with chips well known for their quality: the **Ambarella H22 S85** and the **Sony IMX377** sensor. Still in 2022 it was well placed between the expensives GoPros and the plethora low-end budget cameras. Unfortunately the support from SJCAM was ended in 2020 with the **firwmare 1.3.2** still affected by various bugs, image quality and video codec settings **definitely to be improved**. Also the Adnroid app is disappointing. | The **SCAM SJ8 Pro** is a mid-range priced action camera, equipped with chips well known for their quality: the **Ambarella H22 S85** and the **Sony IMX377** sensor. Still in 2022 it was well placed between the expensives GoPros and the plethora low-end budget cameras. Unfortunately the support from SJCAM was ended in 2020 with the **firwmare 1.3.2** still affected by various bugs, image quality and video codec settings **definitely to be improved**. Also the Adnroid app is disappointing. | ||
- | Fortunately enough, being equipped with the Ambarella chip, it was possible to **reverse engineer** some of its firmware and API. Creating a custom firmware you can imporove | + | Fortunately enough, being equipped with the Ambarella chip, it was possible to **reverse engineer** some of its firmware and API. Creating a custom firmware you can improve |
The main honorable mention goes to the hacker **VMax**, which created the software **[[https:// | The main honorable mention goes to the hacker **VMax**, which created the software **[[https:// | ||
- | See my other page about the SJCAM SJ8 Pro action camera: **[[sjcam-8pro]]**, **[[sjcam-8pro-ambarella-firmware-modding]]** | + | **WARNING**: |
+ | |||
+ | See my other page about the SJCAM SJ8 Pro action camera: | ||
+ | |||
+ | * **[[sjcam-8pro]]** | ||
+ | * **[[sjcam-8pro-ambarella-firmware-modding]]** | ||
+ | * **[[sjcam-8pro-ambarella-wifi-api]]** | ||
===== My Custom firmware ===== | ===== My Custom firmware ===== | ||
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* Increased **bitrates**, | * Increased **bitrates**, | ||
* Increased **keyframes** rates (reducing GOP-N): one keyframe every 1/4 second instead of 1 per second. | * Increased **keyframes** rates (reducing GOP-N): one keyframe every 1/4 second instead of 1 per second. | ||
- | * **YUV color profiles**: all the three profiles **Default**, | + | * **YUV color profiles**: all the three profiles **Default**, |
- | * Fixed **exposition** profiles: **Center**, **Spot** and **Average**. | + | * Fixed **exposition** profiles: **Center**, **Spot** and **Average** |
* Changed **gamma curves**: added some brightness to shadows with an overall gamma coefficient of 1.10 and removed a slight red casting when using Auto White Balance in early hours of sunny days. All the gamma tables for video modes are the same, for photo modes we leaved a linear gamma (1.0) for R, G and B. | * Changed **gamma curves**: added some brightness to shadows with an overall gamma coefficient of 1.10 and removed a slight red casting when using Auto White Balance in early hours of sunny days. All the gamma tables for video modes are the same, for photo modes we leaved a linear gamma (1.0) for R, G and B. | ||
* Change **chroma curves** to reduce banding in blue sky and to attenuate over-saturated colors. | * Change **chroma curves** to reduce banding in blue sky and to attenuate over-saturated colors. | ||
- | * Changed power-on, power-off and photo shutter **sounds** with louder ones. | + | * Changed power-on, power-off and photo shutter **sounds** with **louder** ones. |
* Disabled **LRV** (low resolution videos) recording. | * Disabled **LRV** (low resolution videos) recording. | ||
doc/appunti/hardware/sjcam-8pro-custom-firmware.txt · Last modified: 2023/06/09 07:38 by niccolo