# Black video using v1.5.0 + externalVideoSourceDelegate

**URL:** <https://devforum.zoom.us/t/black-video-using-v1-5-0-externalvideosourcedelegate/77034>\
**Category:** iOS\
**Created:** [October 6, 2022, 12:37pm UTC](https://devforum.zoom.us/t/black-video-using-v1-5-0-externalvideosourcedelegate/77034 "2022-10-06T12:37:31Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![rokgregoric](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/rokgregoric/32/40678_2.png) [@rokgregoric](https://devforum.zoom.us/u/rokgregoric)\
**Post date:** [October 6, 2022, 12:50pm UTC](https://devforum.zoom.us/t/black-video-using-v1-5-0-externalvideosourcedelegate/77034/2 "2022-10-06T12:50:10Z")

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@jackie.chen This happens only when using an `externalVideoSourceDelegate` and  
`session.sessionPreset = .vga640x480`

When setting the preset to:  
`session.sessionPreset = .hd1280x720`  
the starts just fine on start.

I think ☝ is somehow related to [https://devforum.zoom.us/t/wrong-video-aspect-ratio-after-disabling-and-re-enabling-video](https://devforum.zoom.us/t/wrong-video-aspect-ratio-after-disabling-and-re-enabling-video).

Please look into it.

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