From 10395b4738df2c312293460c84b72c13fa0eac70 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 13 Dec 2015 16:13:22 +0100 Subject: [PATCH] avformat/mxfenc: Do not crash if there is no packet in the first stream Fixes: Ticket4914 Signed-off-by: Michael Niedermayer (cherry picked from commit b51e7554e74cbf007a1cab83c7bed3ad9fa2793a) Signed-off-by: Michael Niedermayer --- libavformat/mxfenc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c index f2fc0936c3..5e7a8b8f11 100644 --- a/libavformat/mxfenc.c +++ b/libavformat/mxfenc.c @@ -2211,6 +2211,10 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt) } mxf->edit_units_count++; } else if (!mxf->edit_unit_byte_count && st->index == 1) { + if (!mxf->edit_units_count) { + av_log(s, AV_LOG_ERROR, "No packets in first stream\n"); + return AVERROR_PATCHWELCOME; + } mxf->index_entries[mxf->edit_units_count-1].slice_offset = mxf->body_offset - mxf->index_entries[mxf->edit_units_count-1].offset; }