Crash app when download video hasn't data in manifest

[sangnhh]

Describe the bug
A clear and concise description of what the bug is.
When check audio manifest hasn't m3u8URL then crash app

To Reproduce
Download a video has multi audio and subtitle
Manifest file hasn't m3u8URL
App is crashed

Expected behavior
Check nil with a serveral cases hasn't data

Logs and Screenshots
If applicable, add log and/or screenshots to help explain your problem.

Platform

• OS and version: IOS 13.3.1
• Device type: Iphone/Ipad
• Library version : v3.11.1

Additional context
Add any other context about the problem here.

[noamtamim]

Please explain the case when a manifest doesn't have an m3u8 URL (give an example).

[sangnhh]

#EXTM3U
#EXT-X-VERSION:7

Created with Broadpeak BkS350 Origin Packager(version=1.9.5)

AUDIO groups

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-aacl-128",NAME="Vietnamese",LANGUAGE="vi",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-aacl-128",NAME="Korean",LANGUAGE="ko",AUTOSELECT=YES,CHANNELS="2",URI="player_test-audio_kor=128000.m3u8"

SUBTITLES groups

#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="textstream",NAME="Vietnamese",LANGUAGE="vi",AUTOSELECT=YES,DEFAULT=YES,URI="player_test-textstream_vie=1000.m3u8"

variants

#EXT-X-STREAM-INF:BANDWIDTH=452000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=426x240,FRAME-RATE=30,AUDIO="audio-aacl-128",SUBTITLES="textstream",CLOSED-CAPTIONS=NONE
player_test-audio_vie=128000-video=297000.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=702000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=640x360,FRAME-RATE=30,AUDIO="audio-aacl-128",SUBTITLES="textstream",CLOSED-CAPTIONS=NONE
player_test-audio_vie=128000-video=533000.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=1182000,CODECS="mp4a.40.2,avc1.4D4029",RESOLUTION=854x480,FRAME-RATE=30,AUDIO="audio-aacl-128",SUBTITLES="textstream",CLOSED-CAPTIONS=NONE
player_test-audio_vie=128000-video=986000.m3u8
#EXT-X-STREAM-INF:BANDWIDTH=2235000,CODECS="mp4a.

Example a manifest of me, it isn't enough m3u8 url field in audio group
So when player detects audio which will crash
Tks

[sangnhh]

Now my manifest formats EXT-X-VERSION version 7
Can you check this link
https://developer.apple.com/documentation/http_live_streaming/about_the_ext-x-version_tag
Tks

[noamtamim]

If I get this right, the issue is that this line:

#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio-aacl-128",NAME="Vietnamese",LANGUAGE="vi",AUTOSELECT=YES,DEFAULT=YES,CHANNELS="2"

Doesn't have a URI (because it's the default, built-in audio stream).
Can I get a working playback URL so I can reproduce the issue?

If you want, you can create a pull request, this will speed things up.

[sangnhh]

I give you link nondrm to test

• url no drm: https://bkm.fbox.fpt.vn/bpk-vod/vod-nondrm/default/LetsEat3_T05/LetsEat3_T05/index.m3u8
  Tks

[noamtamim]

I get 404 when I try to request this URL. Please provide a working URL.
And like I wrote, if you think the fix is small - please create a pull request.

[sangnhh]

Vietnam VPN -> can play stream
Other location -> stream 404 error
Can you give me IP address to open VPN connection?
Tks

[sangnhh]

Or Can you also give me your region?

[noamtamim]

@sangnhh I'm sorry it takes a long time to respond. These are crazy times.

Since you can easily reproduce the issue, it would help a lot if you can open a pull request and contribute the fix. Just make sure to sign the Kaltura CLA, otherwise we can't accept the code.