Hi,
this was found when an ffserver is configured to output libvpx encoded video but
the feeding ffmpeg has no libvpx support compiled in.
-Thilo
>From 30adcf74e5eff6e48bd6fee7ad5d9bd68e5429ca Mon Sep 17 00:00:00 2001
From: Thilo Borgmann <thilo.borgm...@mail.de>
Date: Thu, 25 Sep 2014 16:10:58 +0200
Subject: [PATCH] lavu/ffmpeg_opt: Check return value of
avcodec_find_encoder().
Prevents a segfault if a stream featuring a known but unavailable codec (like
external lib codec) should be opened.
Bug found by: Jonas Geistert <j.geist...@yahoo.de>
---
ffmpeg_opt.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index 05ab652..4fb6fa3 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -1623,6 +1623,10 @@ static int read_ffserver_streams(OptionsContext *o,
AVFormatContext *s, const ch
AVCodecContext *avctx;
codec = avcodec_find_encoder(ic->streams[i]->codec->codec_id);
+ if (!codec) {
+ av_log(s, AV_LOG_ERROR, "no encoder found for codec id %i\n",
ic->streams[i]->codec->codec_id);
+ return AVERROR(EINVAL);
+ }
ost = new_output_stream(o, s, codec->type, -1);
st = ost->st;
avctx = st->codec;
--
1.8.5.2 (Apple Git-48)
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