---
libavcodec/utils.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index d42885d..b4fca03 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -1063,6 +1063,14 @@ FF_ENABLE_DEPRECATION_WARNINGS
if (!avctx->rc_initial_buffer_occupancy)
avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;
+ if (avctx->time_base.num <= 0 ||
+ avctx->time_base.den <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "Impossible time base %d/%d.",
+ avctx->time_base.num,
+ avctx->time_base.den);
+ goto free_and_end;
+ }
+
if (avctx->ticks_per_frame &&
avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
av_log(avctx, AV_LOG_ERROR,
--
2.6.1
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