From 654b65d01229ad3016d34c4189d8b31f5981f570 Mon Sep 17 00:00:00 2001
From: David Conrad <lessen42@gmail.com>
Date: Tue, 9 Mar 2010 04:23:33 +0000
Subject: [PATCH] mkvenc: Don't try to write packets with unknown timestamps

Originally committed as revision 22371 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/matroskaenc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 1ed69b47cc..c0d4f1b32a 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -866,6 +866,11 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
     int ret;
     int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
 
+    if (ts == AV_NOPTS_VALUE) {
+        av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
+        return AVERROR(EINVAL);
+    }
+
     if (url_is_streamed(s->pb)) {
         if (!mkv->dyn_bc)
             url_open_dyn_buf(&mkv->dyn_bc);