Jetson_multimedia_api 05_jpeg_encode

[wangmeng_tju]

Hi
I use jetson_multimedia_api samples 05_jpeg_encode to encode NV12 picture. I use command ./jpeg_encode /home/cookoo/yuv2jpg/1.yuv 1280 960 /home/cookoo/yuv2jpg/1_100.jpg -f 2 -quality 100. I can get .jpg picture, but the color is not correct. Can anyone help? Thanks.
1.yuv (1.8 MB)

[DaneLLL]

Hi,
We can observe the issue and will check further. You may encode YUV420 to get valid JPEG.

[wangmeng_tju]

Thanks for the quick response. Please let me know once your team solve this issue.

[DaneLLL]

Hi,
We have confirmed it supports YUV420 by default. For NV12 input, please apply the change to jpeg_encode_proc():

1. Modify format in the line to NVBUF_COLOR_FORMAT_NV12

    params.colorFormat = NVBUF_COLOR_FORMAT_YUV420;

2. NV12 has two planes, so remove the line of reading 3rd plane:

    read_dmabuf(src_dma_fd, 0, ctx.in_file);
    read_dmabuf(src_dma_fd, 1, ctx.in_file);
    read_dmabuf(src_dma_fd, 2, ctx.in_file); // remove this line

Please apply the change and try again.

[wangmeng_tju]

@DaneLLL

jpeg_encode_proc

Thanks DaneLLL, your solution works!