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-rw-r--r--fftools/ffmpeg.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index ba8789a43c..50c2fa5d51 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2710,6 +2710,7 @@ static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eo
ist->dts = ist->next_dts;
switch (ist->dec_ctx->codec_type) {
case AVMEDIA_TYPE_AUDIO:
+ av_assert1(pkt->duration >= 0);
if (ist->dec_ctx->sample_rate) {
ist->next_dts += ((int64_t)AV_TIME_BASE * ist->dec_ctx->frame_size) /
ist->dec_ctx->sample_rate;