From: Niklas Haas <ffmpeg@haasn.xyz>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH 0/5] work around broken (apple) ICCv4 profiles
Date: Wed, 27 Sep 2023 12:03:51 +0200
Message-ID: <20230927100630.50510-1-ffmpeg@haasn.xyz> (raw)
Concludes the discussion from https://trac.ffmpeg.org/ticket/9673
It was found that at least one widely-used ICCv4 profile found in the
wild contains broken tagging which violates the ICCv4 specification. It
seems that lcms2 gets confused by this wrong tag and returns wrong
values for this profile as a result. Work around it by detecting this
case and printing a warning + overriding the tag by the fixed result.
Since this code is *already* hidden behind -flags2 icc_profile, I
decided not to add a separate "fix broken profiles" flag.
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next reply other threads:[~2023-09-27 10:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-27 10:03 Niklas Haas [this message]
2023-09-27 10:03 ` [FFmpeg-devel] [PATCH 1/5] avutil/rational: add av_abs_q Niklas Haas
2023-09-27 10:14 ` Anton Khirnov
2023-09-27 10:22 ` Andreas Rheinhardt
2023-09-27 10:03 ` [FFmpeg-devel] [PATCH 2/5] avutil/csp: re-use av_abs_q Niklas Haas
2023-09-27 10:03 ` [FFmpeg-devel] [PATCH 3/5] avcodec/fflcms2: add ff_icc_profile_sanitize Niklas Haas
2023-09-27 10:20 ` Andreas Rheinhardt
2023-09-27 10:26 ` Niklas Haas
2023-09-27 10:03 ` [FFmpeg-devel] [PATCH 4/5] avfilter/vf_iccdetect: use ff_icc_profile_sanitize Niklas Haas
2023-09-27 10:03 ` [FFmpeg-devel] [PATCH 5/5] avcodec/decode: " Niklas Haas
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