detect avcodec_open() on an already opened AVCodecContext

Originally committed as revision 2251 to svn://svn.ffmpeg.org/ffmpeg/trunk
22 years ago · 09770af869
parent d9d8910bf2
commit 09770af869
1 changed files with 3 additions and 0 deletions
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@ -305,6 +305,9 @@ int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 {
    int ret;

+    if(avctx->codec)
+        return -1;
+
    avctx->codec = codec;
    avctx->codec_id = codec->id;
    avctx->frame_number = 0;