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-rw-r--r--libavcodec/dvbsubdec.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/dvbsubdec.c b/libavcodec/dvbsubdec.c
index ef90f73c1a..955925a619 100644
--- a/libavcodec/dvbsubdec.c
+++ b/libavcodec/dvbsubdec.c
@@ -1343,6 +1343,10 @@ static void dvbsub_parse_display_definition_segment(AVCodecContext *avctx,
display_def->y = 0;
display_def->width = bytestream_get_be16(&buf) + 1;
display_def->height = bytestream_get_be16(&buf) + 1;
+ if (!avctx->width || !avctx->height) {
+ avctx->width = display_def->width;
+ avctx->height = display_def->height;
+ }
if (buf_size < 13)
return;