i.MX ProcessorsのトピックRe: Convert decoder output byte stream to YUV raw image

Convert decoder output byte stream to YUV raw image

haihoang — Fri, 18 Oct 2019 10:34:24 GMT

Dear NXP Media Team,

I used imx8mqevk board, jpeg decode example on libimxvpuapi2 decode a jpeg image. This is a hardware encode/decode library.

Command:

./jpeg-dec-example -i wall.jpg -o output.bin

Output (detail on attach file) :

output file is `output.bin`
data format: frames to output aligned frame size: 1376 x 768 pixel actual frame size: 1366 x 768 pixel Y/Cb/Cr stride: 1376/1376/1376 Y/Cb/Cr size: 1056768/528384/528384 Y/Cb/Cr offset: 0/1056768/1585152 color format: semi planar YUV 4:2:0 8-bit

Problem:
- File output.bin is byte stream data (dma buffer data) so the data can not display properly on yuv viewer software !

- Could you show me a reference way convert (render) output.bin to standard yuv format (output.yuv) ?

Sincerely,

HaiHoang

Re: Convert decoder output byte stream to YUV raw image

igorpadykov — Sun, 20 Oct 2019 10:16:20 GMT

Hi HaiHoang

for conversion may be useful to look at isp application note

https://www.nxp.com/docs/en/application-note/AN12060.pdf

Best regards
igor
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Re: Convert decoder output byte stream to YUV raw image

haihoang — Thu, 24 Oct 2019 05:48:09 GMT

Hi igorpadykov,

Thanks for your replied, In the AN12060, it seem show how to convert from yuv to rgb format is not prefer with i'm looking for is render from byte stream to yuv format. If you have other suggest, please show me

Thank you,

HaiHoang