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Currently, several example dependencies rely on the fact that all registered components are added to the build, along with components specified in common requirements. This results in longer build times because even unused components must be built. Switch all examples to use idf_minimal_build to compile only the components actually required by the example. Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
| Supported Targets | ESP32-P4 |
|---|
JPEG encode example
Overview
This example demonstrates how to use the JPEG hardware encoder to encode a 1080p picture:
This example makes use of the hardware-based JPEG encoder. If you have multiple pictures that need to be decoded, such as *.rgb -> *.jpg, you can use this example to accelerate encoding.
How to use example
Hardware Required
- An Espressif development board based on a chip listed in supported targets
- A USB cable for power supply and serial communication
- Computer with ESP-IDF installed and configured
- The raw picture is the only source that you need to prepare (We have an esp1080p.rgb in resources folder, you can also get it from jpeg_decode example).
- ffmpeg can also be used to produce rgb picture. For example
ffmpeg -i input.jpg -pix_fmt rgb24 output.rgb
Build and Flash
Before you start build and flash this example, please put the image esp1080.rgb in your sdcard.
Enter idf.py -p PORT flash monitor to build, flash and monitor the project.
(To exit the serial monitor, type Ctrl-].)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
Example Output
I (1114) jpeg.example: Initializing SD card
I (1114) gpio: GPIO[43]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (1124) gpio: GPIO[44]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (1134) gpio: GPIO[39]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (1144) gpio: GPIO[40]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (1154) gpio: GPIO[41]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
I (1164) gpio: GPIO[42]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (1414) gpio: GPIO[42]| InputEn: 0| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:0
Name: SD64G
Type: SDHC/SDXC
Speed: 40.00 MHz (limit: 40.00 MHz)
Size: 60906MB
CSD: ver=2, sector_size=512, capacity=124735488 read_bl_len=9
SSR: bus_width=4
I (1434) jpeg.example: infile_1080p:/sdcard/esp1080.rgb
I (5174) jpeg.example: outfile:/sdcard/outjpg.jpg
I (5284) jpeg.example: Card unmounted
I (5284) main_task: Returned from app_main()
Troubleshooting
(For any technical queries, please open an issue on GitHub. We will get back to you as soon as possible.)