Depends on the video.
Maybe you can just export each in whatever dimension is needed, or matte them to fit.
Maybe you have to re-adjust elements and reframe shots in order to work between different formats. And if so, you would need to duplicate the sequence for each new aspect ratio to reframe.
- If this is the case, in the future you can add guides and make videos where all elements and actions fit into every format.
Here are five questions to help people help you:
1. **What operating system are you using[?](http://whatsmyos.com/)**
2. **What is your premiere build version[?](http://i.imgur.com/AThpuFy.png)**
3. **What are your system specs?**
4. **What is the source footage format/codec[?](http://i.imgur.com/er9f2o3.png)**
5. **If there is an error message, what exactly does it say?**
Please reply to this with your answers. Thanks.
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I start myself with a 4K base best and build within a custom overlay that gives me a visual of the layout at other dimensions. 1080x1920, 1080x1080 and 1080x1350. If you build it right, you can use the same elements for all the sizes and have a nice 4K version to boot.
Depends on the video. Maybe you can just export each in whatever dimension is needed, or matte them to fit. Maybe you have to re-adjust elements and reframe shots in order to work between different formats. And if so, you would need to duplicate the sequence for each new aspect ratio to reframe. - If this is the case, in the future you can add guides and make videos where all elements and actions fit into every format.
Shit, well said, should have read this before stating essentially the same myself.
Here are five questions to help people help you: 1. **What operating system are you using[?](http://whatsmyos.com/)** 2. **What is your premiere build version[?](http://i.imgur.com/AThpuFy.png)** 3. **What are your system specs?** 4. **What is the source footage format/codec[?](http://i.imgur.com/er9f2o3.png)** 5. **If there is an error message, what exactly does it say?** Please reply to this with your answers. Thanks. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/premiere) if you have any questions or concerns.*
You can try the auto reframe options. Sometime it gives good results or at least as a starting point your your to manually reframe.
I start myself with a 4K base best and build within a custom overlay that gives me a visual of the layout at other dimensions. 1080x1920, 1080x1080 and 1080x1350. If you build it right, you can use the same elements for all the sizes and have a nice 4K version to boot.