Dirk Farin

icon indicating a website link http://dirk-farin.net/ icon indicating an email [email protected]

icon company Dirk Farin - Algorithmic Research e.K. icon location I have a background in video coding and computer vision. After working in research and software development, I now work independently on my own projects and OSS

Results 455 comments of Dirk Farin

nvidia hardware decoder support

I've measure the actual decoding time (excluding all initializations and conversions) for a tiled h265 image. - nvdec: 0.42sec - libde265: 0.55sec - ffmpeg: 0.40sec (I think this is the...

Unwanted color change

There was a fix for HDR color conversion coefficients (643ca81c20b065bf9eac2e6d86eaef5da44d0699). Did that fix the issue?

Unwanted color change

@Aoi-Kuro Can we close this?

Rewrite CI actions

We should also add a CI build using MSYS2 as mentioned here: https://github.com/strukturag/libheif/issues/1584#issuecomment-3223190892

Invalid read of size 2 in Op_YCbCr420_to_RRGGBBaa::convert_colorspace

Thank you. The image is 16 bit, but has an alpha plane with only 8 bits. The color-conversion expects both to be similar. I've added an error check for this...

heif_decode_image() returns heif_status=heif_error_Ok although returned heif_image is null while under resource limits

I tried this on your image with the current master branch and also with v1.20.1, but I cannot reproduce it since the image decoded fine with both versions: I see...

heif_decode_image() returns heif_status=heif_error_Ok although returned heif_image is null while under resource limits

Can you tell me which libheif version or commit you are using so that I can use the same?

Default color space should be set to BT.709, otherwise save incorrect colors.

We use these defaults ```` profile->color_primaries = heif_color_primaries_ITU_R_BT_709_5; // 1 profile->transfer_characteristics = heif_transfer_characteristic_IEC_61966_2_1; // 13 profile->matrix_coefficients = heif_matrix_coefficients_ITU_R_BT_601_6; // 6 profile->full_range_flag = true; ```` because in the past this gave...

Default color space should be set to BT.709, otherwise save incorrect colors.

Given your last comment, it sounds to me that this is actually a Photoshop bug and Photoshop does not correctly read the default nclx combination that libheif uses (1 /...

Default color space should be set to BT.709, otherwise save incorrect colors.

Maybe they all use the same Windows API for that? Could you attach the input JPEG file? I will then try on other systems, like macOS.