@@ -284,7 +284,7 @@ static int read_header(AVFormatContext *s1, AVFormatParameters *ap)

         s->split_planes = str && !av_strcasecmp(str + 1, "y");

         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;

         st->codec->codec_id = av_str2id(img_tags, s->path);

-        if (st->codec->codec_id = CODEC_ID_LJPEG)

+        if (st->codec->codec_id == CODEC_ID_LJPEG)

             st->codec->codec_id = CODEC_ID_MJPEG;

     }

     if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pix_fmt != PIX_FMT_NONE)