avcodec/dvdsubdec: ignore h <= 1 case, to properly decode subtitle

Fixes #5825. If h == 1, second decode_rle() fails.

Regression since: 3f0a3e9e127d067c5cf65640a44765c1ddd01622.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index 19f25f0e60bf120176123636b9d26d45b287f0fa..b81b481e4376b1dde9a8016622868c07357de531 100644 (file)
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -368,7 +368,7 @@ static int decode_dvd_subtitles(DVDSubContext *ctx, AVSubtitle *sub_header,
             h = y2 - y1 + 1;
             if (h < 0)
                 h = 0;
-            if (w > 0 && h > 0) {
+            if (w > 0 && h > 1) {
                 reset_rects(sub_header);
 
                 sub_header->rects = av_mallocz(sizeof(*sub_header->rects));