Cannot get duration or seek from an SSAI live content

[247az]

ExoPlayer Version

2.17.1

Devices that reproduce the issue

Any devices

Devices that do not reproduce the issue

No response

Reproducible in the demo app?

Yes

Reproduction steps

1. Open the demo app
2. Open the SSAI content below (HLS format)
   
3. Cannot get duration of the content, seekbar do not show progress, and you cannot seek on the seekbar.
   

Expected result

It is possible to get the duration of the SSAI content and display it.

Actual result

Cannot get duration of the content, seekbar do not show progress, and you cannot seek on the seekbar.

Media

You can reproduce and see the situation on the Demo app

Bug Report

• You will email the zip file produced by adb bugreport to dev.exoplayer@gmail.com after filing this issue.

[tonihei]

As the title of the stream indicates, this is a live stream and ExoPlayer's SSAI media source currently removes the duration for live streams. I'm not entirely sure, but this may have been accidental and I can look into adding it back.

[donny9095]

I have the same problem

[247az]

@tonihei
Thank you, Tonihei.
I hope you can look into it and fix it soon !

[donny9095]

@tonihei
Sorry to bother you, but do you have any new information on this issue ? Can you fix and release it to the next version ?

[247az]

@tonihei
I have rechecked this issue on the latest version. But there seems to be another problem going on.
The version can be seen on the image I attached, duration is showing a negative value.
I'm not sure exactly how to reproduce it, but I think you can reproduce this error by following the steps below:

1. Open the content HLS Live: Big Buck Bunny (mid) 3 ads [10/10/10s]
2. After the Ad is finished playing, you seek it back to position 0. (Or seek it to the end position, then seek it to position 0 again).
3. You can see duration is showing negative value.

You can also see the problem in the video I attached.

Screenshot:

Video:
https://user-images.githubusercontent.com/114720380/204438689-638f45b5-e6ad-4361-8dbc-e6e049c42309.mp4

Can you please check this problem ? Thank you.

[tonihei]

What you circled in the screenshot is the current position, not the duration. The duration is the 01:10 next to it. The position may become negative in a live stream if you seek back or pause and then fall out of the live window. This may mean that future loads may fail, but playback is likely to continue initially with the data that has already been buffered.

[247az]

@tonihei
Thank you for your reply.

What you circled in the screenshot is the current position, not the duration. The duration is the 01:10 next to it.

Oh, sorry, my bad, I mean the current position, not the duration.

The position may become negative in a live stream if you seek back or pause and then fall out of the live window. This may mean that future loads may fail, but playback is likely to continue initially with the data that has already been buffered.

Sorry, but this problem can be fixed ?

[tonihei]

Sorry, but this problem can be fixed ?

There is nothing to fix, this is working as intended. If your playback position falls behind the live window, then you play at a negative position relative to the start of the live window.

[247az]

Hi @tonihei
Sorry for reopening this issue.

But I've tested the fixing on the HLS DAI stream which encrypted by AES-128. But it doesn't seem to work.
I tested on version 2.17.1 again, no problem. But after updating ExoPlayer to version 2.18.0 or above, then playback cannot start. And the request to the license server is also absent.

We use requestHeaders for the request to the license server.

httpDataSourceFactory.setDefaultRequestProperties(requestHeaders)

Note that, there are no problems on 2.17.1 version

On 2.17.1
Has request to the license server: https://qaplg02east.keydelivery.japaneast.media.azure.net/?kid=d54fb5c8-513e-4340-a936-a45f818997de

On 2.18.0 or above
No request to the license server: https://qaplg02east.keydelivery.japaneast.media.azure.net/?kid=d54fb5c8-513e-4340-a936-a45f818997de
--> So the video or audio fragment can not be downloaded.

There aren't any errors thrown from the ExoPlayer side, but if you look at the event log it looks a bit strange. With a period [?].

Event log:

EventLogger: timeline [eventTime=156.27, mediaPos=8778.77, window=0, period=0, periodCount=1, windowCount=1, reason=SOURCE_UPDATE
EventLogger:   period [?]
EventLogger:   window [8932.92, seekable=true, dynamic=true]
EventLogger: ]

I've checked on another HLS stream (not HLS DAI stream), it seems OK. And only happens on SSAI contents.

Can you please check this issue on HLS DAI stream which encrypted by AES-128 ? I think this is a big problem.

#EXTM3U
#EXT-X-VERSION:4
#EXT-X-TARGETDURATION:3
#EXT-X-MEDIA-SEQUENCE:1
#EXT-X-DISCONTINUITY-SEQUENCE:0
#EXT-X-I-FRAMES-ONLY

#EXT-X-KEY:METHOD=AES-128,URI="https://qaplg02east.keydelivery.japaneast.media.azure.net/?kid=d54fb5c8-513e-4340-a936-a45f818997de",IV=0X79D4C126D68BB73240DF2B5292ED2EC0
#EXT-X-PROGRAM-DATE-TIME:2022-12-07T05:31:07Z
#EXTINF:2.002000,no-desc
https://qartvnplg-hls02-east.akamaized.net/09bad558-a9ca-44d0-9350-f0655eedd77b/4f9e1815-629d-4797-912d-d08909eb25e6.ism/QualityLevels(200000)/KeyFrames(video=20020000,format=m3u8-aapl,encryption=cbc)
#EXTINF:2.002000,no-desc
https://qartvnplg-hls02-east.akamaized.net/09bad558-a9ca-44d0-9350-f0655eedd77b/4f9e1815-629d-4797-912d-d08909eb25e6.ism/QualityLevels(200000)/KeyFrames(video=40040000,format=m3u8-aapl,encryption=cbc)
#EXTINF:2.002000,no-desc
https://qartvnplg-hls02-east.akamaized.net/09bad558-a9ca-44d0-9350-f0655eedd77b/4f9e1815-629d-4797-912d-d08909eb25e6.ism/QualityLevels(200000)/KeyFrames(video=60060000,format=m3u8-aapl,encryption=cbc)
#EXTINF:2.002000,no-desc
https://qartvnplg-hls02-east.akamaized.net/09bad558-a9ca-44d0-9350-f0655eedd77b/4f9e1815-629d-4797-912d-d08909eb25e6.ism/QualityLevels(200000)/KeyFrames(video=80080000,format=m3u8-aapl,encryption=cbc)
#EXTINF:2.002000,no-desc
....

[tonihei]

This is unrelated to the previous issue. Could you open a new one for this? If you do so, please also provide more detailed information about how you set up the player.

[247az]

@tonihei
I've confirmed this again.
From version 2.18.0, this error will occur.
Can you tell me from version 2.18.0, what has changed when playing HLS stream which encrypted by AES-128 ?
Because I have checked in version 2.17.1, there is no problem. So I think this is not a data problem on our side, but something wrong with ExoPlayer.