Opened 8 years ago
Closed 8 years ago
#4983 closed defect (invalid)
Grayscale PNG to grayscale rawvideo gives strange result
| Reported by: | kagami | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | git-master | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
I have simple 16x16 grayscale PNG image with checkboard pattern. Pixel values go like this: 0x00 0xff ..
I convert it to rawvideo grayscale with: ffmpeg -i in.png -f rawvideo -pix_fmt gray out.y and it gives me following result:
$ xxd out.y 00000000: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 00000010: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 00000020: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 00000030: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 00000040: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 00000050: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 00000060: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 00000070: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 00000080: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 00000090: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 000000a0: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 000000b0: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 000000c0: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 000000d0: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................ 000000e0: ff00 ff00 ff00 ff00 ff00 ff00 ff00 ff00 ................ 000000f0: 00ff 00ff 00ff 00ff 00ff 00ff 00ff 00ff ................
For some reason I get 0xff 0x00 .. pattern in the output.
Attachments (1)
Change History (2)
by , 8 years ago
comment:1 by , 8 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
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Oh, sorry, it's actually correct.