Hi!
Attached patch fixes reading valid pict files with non-zero user data.
https://developer.apple.com/legacy/library/documentation/mac/QuickDraw/QuickDraw-334.html
Please comment, Carl Eugen
diff --git a/libavcodec/qdrw.c b/libavcodec/qdrw.c
index 1c3244b..6ec35c6 100644
--- a/libavcodec/qdrw.c
+++ b/libavcodec/qdrw.c
@@ -124,9 +124,8 @@ static int decode_frame(AVCodecContext *avctx,
int w, h, ret;
bytestream2_init(&gbc, avpkt->data, avpkt->size);
- while ( bytestream2_get_bytes_left(&gbc) >= 552
- && ( !AV_RB16(&avpkt->data[bytestream2_tell(&gbc)+6])
- || !AV_RB16(&avpkt->data[bytestream2_tell(&gbc)+8])))
+ if ( bytestream2_get_bytes_left(&gbc) >= 552
+ && AV_RB32(&avpkt->data[522]) == 0x001102FF)
bytestream2_skip(&gbc, 512);
/* smallest PICT header */
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