From 8378056a04f02ad16445e352a4b95374e4716ddd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EC=8A=88=EB=A6=AC=ED=8A=AC?= <9804cjh@naver.com>
Date: Sat, 11 Sep 2021 21:08:04 +0900
Subject: [PATCH] Fix the problem when audioFormat's length is zero.

In befor code,
```js
if(opusFormats.length === 0){
        type = StreamType.Arbitrary
        final.push(audioFormat[audioFormat.length - 1])
    }
    else{
        type = StreamType.WebmOpus
        final.push(opusFormats[opusFormats.length - 1])
    }

    if(final.length === 0) {
        type = StreamType.Arbitrary
        final.push(info.format[info.format.length - 1])
    }
```
length of final cannot be 0 coz it only check `opusFormats.length === 0`.
---
 play-dl/YouTube/stream.ts | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/play-dl/YouTube/stream.ts b/play-dl/YouTube/stream.ts
index 7de9d70..31891e6 100644
--- a/play-dl/YouTube/stream.ts
+++ b/play-dl/YouTube/stream.ts
@@ -59,17 +59,17 @@ export async function stream(url : string, cookie? : string): Promise<Stream | L
 
     if(opusFormats.length === 0){
         type = StreamType.Arbitrary
-        final.push(audioFormat[audioFormat.length - 1])
+	if(audioFormat.length === 0){
+            final.push(info.format[info.format.length - 1])
+	}
+	else{
+            final.push(audioFormat[audioFormat.length - 1])
+	}
     }
     else{
         type = StreamType.WebmOpus
         final.push(opusFormats[opusFormats.length - 1])
     }
-
-    if(final.length === 0) {
-        type = StreamType.Arbitrary
-        final.push(info.format[info.format.length - 1])
-    }
     
     return new Stream(final[0].url, type, info.video_details.durationInSec, Number(final[0].contentLength))
 }
@@ -99,17 +99,17 @@ export async function stream_from_info(info : InfoData, cookie? : string): Promi
 
     if(opusFormats.length === 0){
         type = StreamType.Arbitrary
-        final.push(audioFormat[audioFormat.length - 1])
+	if(audioFormat.length === 0){
+            final.push(info.format[info.format.length - 1])
+	}
+	else{
+            final.push(audioFormat[audioFormat.length - 1])
+	}
     }
     else{
         type = StreamType.WebmOpus
         final.push(opusFormats[opusFormats.length - 1])
     }
-
-    if(final.length === 0) {
-        type = StreamType.Arbitrary
-        final.push(info.format[info.format.length - 1])
-    }
     
     return new Stream(final[0].url, type, info.video_details.durationInSec, Number(final[0].contentLength))
 }