From bde27e1e617dfeb3c026f530f48a77f5ed8aa2ea Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 4 Dec 2014 18:58:38 +0100 Subject: [PATCH] doc/examples/transcoding: check encoder before using it Fixes null pointer exception Found-by: stoupeace Signed-off-by: Michael Niedermayer --- doc/examples/transcoding.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/examples/transcoding.c b/doc/examples/transcoding.c index 759c628e93..5572461616 100644 --- a/doc/examples/transcoding.c +++ b/doc/examples/transcoding.c @@ -116,6 +116,10 @@ static int open_output_file(const char *filename) || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) { /* in this example, we choose transcoding to same codec */ encoder = avcodec_find_encoder(dec_ctx->codec_id); + if (!encoder) { + av_log(NULL, AV_LOG_FATAL, "Neccessary encoder not found\n"); + return AVERROR_INVALIDDATA; + } /* In this example, we transcode to same properties (picture size, * sample rate etc.). These properties can be changed for output