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-rw-r--r--src/ufodecode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/ufodecode.c b/src/ufodecode.c
index 8a6b53a..a060cdc 100644
--- a/src/ufodecode.c
+++ b/src/ufodecode.c
@@ -598,7 +598,7 @@ size_t ufo_decoder_decode_frame(UfoDecoder *decoder,
break;
case 4:
case 5:
- meta->n_rows = rows_per_frame = raw[pos] & 0x7FF;
+ meta->n_rows = rows_per_frame = raw[pos + 5] & 0x7FF;
meta->frame_number = raw[pos + 6] & 0x1FFFFFF;
meta->time_stamp = raw[pos + 7] & 0xFFFFFF;
meta->output_mode = (raw[pos + 7] >> 24) & 0x3;