Video Size and Aspect Ratio

Choosing the right aspect ratio ensures your video fits perfectly on whatever platform you plan to share it. In Flixier, you don’t have to worry about calculating exact dimensions from scratch. The editor is built to handle the heavy lifting for you.
 

Automatic Aspect Ratio Matching

When you import your first piece of media into a project, Flixier will automatically detect its dimensions and match the project canvas to your media size.

You can leave it as-is or change it at any time if you want to target a specific platform format.

Standard Preset Formats

If you need to change your video format or want to set a specific size from the start, you can choose from five standard presets in the canvas settings:

• Widescreen (16:9): The standard cinematic and landscape orientation. Best for YouTube, Vimeo, and traditional desktop presentations.
• Portrait (9:16): The vertical smartphone standard. Perfect for TikTok, Instagram Reels, YouTube Shorts, and mobile stories.
• Classic Portrait (2:3): A tall format favored for Pinterest pins and optimal visibility on specific mobile feeds.
• Square (1:1): A balanced layout popular for regular Instagram feed posts and clean, aesthetically focused social grids.
• Social (4:5): A slightly taller portrait frame optimized to take up maximum vertical screen real estate on Facebook and Instagram feeds.

Handling Mismatched Media (Black Bars)

If you drop a video clip or image onto a canvas that has a different aspect ratio (for example, putting a widescreen 16:9 video into a vertical 9:16 TikTok format), you will see black bars around the media.

To fix this quickly:

1. Click on the video clip in your timeline.
2. Look at the Properties menu on the right.
3. Select either Fit to Canvas (shrinks or expands the clip to fit entirely within the frame) or Fill to Canvas (crops and stretches the clip to cover the entire background space).

Note: Stretching or scaling up a low-resolution clip to fit a massive high-definition canvas can lower the visual quality of that specific asset. If you want to keep its original crispness, consider changing your overall project resolution to match the source file.

Setting a Custom Resolution

If you need to build a video with highly specific, non-standard dimensions:

1. Make sure no specific timeline item is selected so you can view the overall project settings.
2. Look at the Properties panel on the right side of the screen.
3. Locate the custom dimension boxes: W stands for Width and H stands for Height.
4. Type your exact required pixel values directly into these fields to instantly reshape your canvas.