Am 03.10.2020 um 13:25 schrieb Paul B Mahol:
On Sat, Oct 03, 2020 at 08:27:20AM +0200, Michael Koch wrote:
Use correct player like mpv, which does not ignore color_trc.
A player? The output is a jpg image and it's too dark.
Yes, player, ffmpeg is not correct in conversion. Because swscale is old
and ignores color_trc metadata that is required for correct display.
Use zscale instead for converting pixel formats.
Can you please give an example how to convert a DNG image to a JPG image
with FFmpeg?
I did try
ffmpeg -i sample_r00000.dng -vf zscale -y out.jpg
but it gives an error message.
The input image is from
https://drive.google.com/drive/folders/1u5m7aVAFPpEsL4YtDVsfSpfcve9PFG4m
and IrfanView has no problem to open this image.
Then join IrfanView mailing list.
Why should I? IrfanView has no problem.
Every single DNG file you posted is invalid in some part.
Adobe is the creator of the DNG format and it sounds quite unlikely that
their own DNG Converter produces invalid DNG files. I tested that the
files can be opened with IrfanView, Windows Media Player, Fitswork, 3D
LUT Creator and GIMP with Darktable plugin.
I saw that you fixed it (thanks for that!) and will test it soon.
The images from the above link are a different thing, as I don't know
how they were created. I agree that they might be invalid.
Michael
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