Hi!
Attached patch fixes ticket #4772 for me.
Please comment, Carl Eugen
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 899af4e..039fe0e 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -345,6 +345,12 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
i, h_count[i], v_count[i],
s->component_id[i], s->quant_index[i]);
}
+ if ( nb_components == 4
+ && s->component_id[0] == 'C' - 1
+ && s->component_id[1] == 'M' - 1
+ && s->component_id[2] == 'Y' - 1
+ && s->component_id[3] == 'K' - 1)
+ s->adobe_transform = 0;
if (s->ls && (s->h_max > 1 || s->v_max > 1)) {
avpriv_report_missing_feature(s->avctx, "Subsampling in JPEG-LS");
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