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commit beb716845250257b9ae42c5cd60ad8cf1847ea5a Author: Martin Mirchev <[email protected]> AuthorDate: Sun Oct 18 16:30:57 2026 +0800 Commit: michaelni <[email protected]> CommitDate: Mon Oct 19 00:51:53 2026 +0000 swscale/output: write the last partial byte in the mono error-diffusion paths The SWS_DITHER_ED branches of yuv2mono_1_c_template() and yuv2mono_2_c_template() only store a byte when (i & 7) == 6, so for widths whose last pixel pair does not end a byte the final partial byte of each row is never written and keeps whatever the destination held. Converting a white 100x8 frame with -sws_flags +error_diffusion -pix_fmt monob leaves the last 4 pixels of rows 1-7 black (0x00 instead of 0xf0). Write the pending bits after the loop, shifted into the high bits as monob expects, like the non-ED paths. Signed-off-by: Martin Mirchev <[email protected]> --- libswscale/output.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libswscale/output.c b/libswscale/output.c index 760dca642e..5cc5cf026d 100644 --- a/libswscale/output.c +++ b/libswscale/output.c @@ -749,6 +749,8 @@ yuv2mono_2_c_template(SwsInternal *c, const int16_t *buf[2], output_pixel(*dest++, acc); } c->dither_error[0][i] = err; + if (i & 6) + output_pixel(*dest, acc << (8 - (i & 7))); } else { for (i = 0; i < dstW; i += 8) { int Y; @@ -807,6 +809,8 @@ yuv2mono_1_c_template(SwsInternal *c, const int16_t *buf0, output_pixel(*dest++, acc); } c->dither_error[0][i] = err; + if (i & 6) + output_pixel(*dest, acc << (8 - (i & 7))); } else { for (i = 0; i < dstW; i += 8) { unsigned acc = 0; -- 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]
