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commit 208a950c275d34a1eca1fe5b34e687a52da78787 Author: Lynne <[email protected]> AuthorDate: Tue Aug 18 13:55:47 2026 +0900 Commit: Lynne <[email protected]> CommitDate: Tue Aug 18 13:58:06 2026 +0900 vulkan/ffv1: stop decoding the extra RGB bit on 4.8+ streams 4.8 dropped the extra coded bit on the primary and alpha planes of RCT slices, but the integer path of get_slice_bits() hardcoded the old widths, garbling every software-encoded v4 RGB stream. The Vulkan encoder writes 4.3 and was unaffected. --- libavcodec/vulkan/ffv1_common.glsl | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/libavcodec/vulkan/ffv1_common.glsl b/libavcodec/vulkan/ffv1_common.glsl index 57331c814b..40520f9cbc 100644 --- a/libavcodec/vulkan/ffv1_common.glsl +++ b/libavcodec/vulkan/ffv1_common.glsl @@ -146,7 +146,16 @@ uint slice_coord(uint width, uint sx, uint num_h_slices, uint chroma_shift) u16vec4 get_slice_bits(in SliceContext sc) { #ifndef FLOAT - return u16vec4(c_bits, c_bits, c_bits, c_bits); + u16vec4 bits = u16vec4(c_bits, c_bits, c_bits, c_bits); +#ifdef RGB + /* 4.8 stopped coding the extra bit on the primary and alpha planes */ + if (sc.slice_coding_mode == 0 && + (version > 4 || (version == 4 && micro_version >= 8))) { + bits[0] = uint16_t(c_bits - 1); + bits[3] = uint16_t(c_bits - 1); + } +#endif + return bits; #else u32vec4 cnt = sc.remap_count; #if defined(ENCODE) -- To stop receiving notification emails like this one, please contact [email protected]. _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
