Session replays record too long

[kimwest00]

Platform

Flutter Mobile iOS, Flutter Mobile Android

Obfuscation

Disabled

Debug Info

Disabled

Doctor

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! Doctor found issues in 1 category.

Version

^8.11.0

Steps to Reproduce

just basic setting follow docs

I just add below code for activating replay function when Sentry.init

experimental.replay.onErrorSampleRate = 0.1
experimental.privacy.maskAllText = false
experimental.privacy.maskAllImages = false;

I found similar issue on javascript sdk(getsentry/sentry-javascript#13778)

Expected Result

Record within 60 minutes
This is stated in the document

Actual Result

Replay recorded too long sometimes
This affect so much on our team's price limit because of too lots of attachments;)
We need quick resolve on this

Are you willing to submit a PR?

None

[vaind]

I've tried reproducing this locally by running an app on an Android device. I've had a script that periodically scrolls the app so that it doesn't go into background. After 1 hour, the replay stopped, as expected, with I/Sentry (20135): Session replay deadline exceeded (1h), stopping recording

Can you check your replays to verify they're actually being recorded for more than 60 minutes? What could happen is that the app is in the background (and not recording) but if an error occurs while in the background, it will be linked to the replay and advance the timestamp. For example, the following replay shows a native example app that was in the background for 3 hours and then there was an error. The light-gray bar (which in this case actually fills the whole progress bar visually, because the real recording only has 10 seconds), shows that the video is unavailable:

[kimwest00]

I check this again and in my case, found that the "Video unavailable" label point was recorded at a timestamp of over 20 hours
Did you explain that when the "Video Unavailable" state occurs and no recording is made, it also impacts the size of individual replays smaller?

Since implementing the Session Replay feature, cases of exceeding attachment limits have become frequent.
So I suspect that the Session Replay feature unintentionally generates excessively large attachments, which impacts billing.

However, the size of individual sessions is not explicitly listed (e.g., the size shown in the issue's attachments menu), making it difficult to confirm whether this assumption is accurate.

In summary, I want to confirm whether Session Replay recordings exceeding one hour significantly contribute to the increase in attachment size.

[vaind]

Replays are not attachments and are priced separately and the length of a replay doesn't impact how they're billed. You can head over to https://sentry.io/settings/billing/overview/ to see how your quote is used.

[vaind]

I believe the questions in this issue have been answered. Feel free to open a new issue if there's something else to clarify.