How Do I Resize a Video in OBS? Your Ultimate Guide to Perfect OBS Video Sizing

You want to know how to resize a video in OBS? The quickest way is to select the video source in your OBS Studio scene, then click and drag one of the red corner handles to adjust its size. Hold down the Shift key while dragging to free-scale without maintaining the aspect ratio, or hold Alt to crop the video directly. For more precise control, right-click the video source, go to Transform, and select Edit Transform to input exact dimensions or use specific bounding box options.

I remember this one time, my friend Sarah was trying to get her new webcam feed to fit perfectly into her streaming layout in OBS Studio. She was all excited, had this snazzy overlay, a cool game capturing beautifully, but then there was her facecam – it was either way too big, awkwardly stretched, or tiny in a corner with black bars staring back at her. She’d spend what felt like an eternity dragging those little red boxes, only to get frustrated when it wouldn’t snap right or just looked plain off. “It’s driving me absolutely bonkers!” she’d exclaim, throwing her hands up in exasperation. “Why can’t I just make this video the right size in OBS?”

Sound familiar? You’re definitely not alone. It’s a pretty common sticking point for a lot of folks diving into streaming or content creation with OBS. While OBS Studio is an incredibly powerful, versatile tool, its interface, especially when it comes to something seemingly straightforward like resizing, can feel a little daunting at first glance. There are actually a few different “levels” of resizing you can do in OBS, and understanding each one is key to getting your videos looking just right, whether you’re dealing with a game capture, a webcam, a media file, or even your entire output for streaming or recording.

My own journey with OBS started much the same way. I remember meticulously setting up a scene for a gameplay commentary, only to realize during playback that my webcam was oddly cropped and the game capture wasn’t quite filling the screen as I’d intended. It took some digging, a fair bit of trial and error, and yes, a few moments of head-scratching frustration to really wrap my head around the nuances of resizing. But once it clicks, man, it opens up a whole new world of creative control. And that’s exactly what we’re gonna do here today – walk through everything you need to know, from the basic drag-and-drop to the nitty-gritty settings, so you can resize your videos in OBS with confidence and precision.

Understanding the Core Concepts of OBS Video Sizing

Before we dive into the “how-to,” it’s super important to grasp a couple of fundamental concepts that OBS uses for video sizing. These are the bedrock upon which all your resizing efforts will stand, and understanding them will save you a ton of headaches down the line.

Base (Canvas) Resolution vs. Output (Scaled) Resolution

Think of your Base (Canvas) Resolution as your digital workspace – it’s the size of the “canvas” you’re building your scene on. If you’re designing a poster, this would be the physical dimensions of the poster paper itself. All your sources (webcam, game, images, text) are placed onto this canvas. Most streamers and content creators usually set this to a standard high-definition resolution like 1920×1080 (1080p) or even 2560×1440 (1440p) if their monitor and hardware support it.

The Output (Scaled) Resolution, on the other hand, is the actual resolution that OBS will stream or record your content at. This is often the same as your Base Resolution, especially for recording high-quality local files. However, for streaming, you might “downscale” your output resolution to something lower, like 1280×720 (720p), to reduce bandwidth requirements and make your stream more accessible to viewers with slower internet connections. It’s essentially taking your finished poster and deciding what size picture of it you’re going to send out to the world.

The magic happens when these two differ. If your Base Resolution is 1080p, but your Output Resolution is 720p, OBS will automatically scale down everything on your canvas to fit the 720p output. This downscaling process involves a “downscale filter,” which we’ll talk about a bit later.

Sources vs. Scenes vs. Project

• Sources: These are individual elements like your webcam, game capture, an image, a video file, text, or browser window. Each source has its own inherent resolution and can be individually resized, cropped, and positioned within a scene.
• Scenes: A scene is a collection of sources arranged in a specific layout. Think of it as a slide in a presentation. You might have a “Just Chatting” scene with your webcam large and a background, and a “Gaming” scene with your game capture prominent and your webcam smaller in a corner. You can transition between different scenes.
• Project: Your entire OBS setup, encompassing all your scenes, sources, audio mixers, and settings, makes up your project. When you resize your Base or Output resolution, it affects the entire project.

Understanding these distinctions is crucial because how you resize depends on what you’re trying to achieve. Are you resizing one element within your layout, or are you changing the overall resolution of your entire stream or recording?

Why Resizing Matters: Performance, Quality, and Platform Requirements

Getting your video sizing right isn’t just about aesthetics; it profoundly impacts the technical aspects of your stream or recording:

• Performance: Streaming or recording at very high resolutions (e.g., 4K) or with complex downscaling can be incredibly demanding on your computer’s CPU and GPU. If your system can’t keep up, you’ll experience dropped frames, stuttering, and a generally poor quality output.
• Quality: Proper resizing ensures your content looks sharp and clear. Incorrect scaling, especially upscaling, can lead to pixelation and blurriness. Using the right downscale filter can make a huge difference in maintaining visual fidelity when you reduce resolution.
• Platform Requirements: Different streaming platforms (Twitch, YouTube, Facebook Gaming) have recommended resolutions and bitrates. Sizing your output appropriately helps you meet these recommendations and ensures your audience has a smooth viewing experience.

Method 1: Resizing Individual Sources within a Scene

This is probably the most common type of resizing you’ll do in OBS. It involves adjusting the size and position of individual elements like your webcam, game capture, or an image, so they fit perfectly within your current scene layout. This doesn’t change your overall stream resolution, just how one piece of it looks.

The Drag-and-Drop Method: Simple and Intuitive

The easiest and most frequently used way to resize a source is simply by clicking and dragging. Here’s how you do it:

1. Select the Source: In your OBS Studio interface, make sure you’re on the correct scene. In the “Sources” dock, click on the source you want to resize (e.g., “Webcam”).
2. Identify Bounding Box: Once selected, you’ll see a red bounding box appear around the source in the preview window. This box has small red squares (handles) at each corner and in the middle of each side.
3. Resize: Click and drag one of the corner handles.
   • Standard Scaling: By default, dragging a corner handle will scale the source proportionally, maintaining its aspect ratio. This is usually what you want to do to avoid stretching or squishing your video.
   • Free-Scaling (Stretch/Squish): If you hold down the Shift key while dragging a corner handle, you can freely stretch or squish the source, changing its aspect ratio. Use this with caution, as it can make your video look distorted.
   • Cropping: If you hold down the Alt key (Option on Mac) while dragging a corner or side handle, you will crop the source. This effectively cuts off parts of the video or image, showing only a portion of it. This is super handy for removing unwanted elements around the edges of a capture or a webcam feed.
4. Position: To move the source around your scene, simply click and drag anywhere inside the red bounding box (not on a handle).

Pro-Tip: Snapping! OBS has a built-in “snap” feature. When you drag a source near the edge of the canvas or another source, it will automatically try to snap into alignment. This is a real time-saver for creating clean layouts. You can temporarily disable snapping by holding down the Ctrl key (Command on Mac) while dragging.

Transform Options: For Precision and Advanced Control

While drag-and-drop is great for quick adjustments, sometimes you need absolute precision. That’s where the Transform options come in.

1. Right-Click the Source: In either the “Sources” dock or directly on the source in the preview window, right-click the item you want to resize.
2. Navigate to Transform: From the context menu, hover over “Transform.”
3. Select “Edit Transform”: Click on “Edit Transform” to open a dedicated window with detailed controls.

Inside the “Edit Transform” window, you’ll find a treasure trove of options:

• Position:
  • X / Y: Allows you to set the exact pixel coordinates for the top-left corner of your source on the canvas.
  • Alignment: You can quickly snap your source to the center, top-left, bottom-right, etc., of the canvas or its bounding box.
• Size:
  • Width / Height: Enter precise pixel dimensions for your source. If “Lock Aspect Ratio” is checked (which it usually is by default, and you should keep it that way unless you *intend* to stretch), changing one dimension will automatically adjust the other.
• Rotation: Rotate your source by a specific degree.
• Crop:
  • Left / Top / Right / Bottom: Input pixel values to precisely crop your source from each side. This is far more accurate than Alt-dragging.
• Bounding Box Type: This is a powerful setting that dictates how OBS handles your source’s size in relation to its bounding box.
  • No Bounds: The source is exactly as big as you make it, and its bounding box matches.
  • Stretch to Bounds: The source will stretch or squish to fill the bounding box you define. Useful if you want a source to always fill a specific area, regardless of its original aspect ratio.
  • Scale to Inner Bounds: The source will scale down to fit entirely within the bounding box, maintaining its aspect ratio. This might leave empty space (letterboxing or pillarboxing) within the bounds.
  • Scale to Outer Bounds: The source will scale up to fill the bounding box, maintaining its aspect ratio. This will likely crop parts of the source if its aspect ratio doesn’t match the bounds.
  • Bounds to Inner/Outer Width/Height: These are more specific options for aligning to particular dimensions.
• Reset Transform: A lifesaver! If you’ve messed up a source’s size or position, clicking this will revert it to its original size and placement (usually full canvas size).
• Fit to Screen: Quickly resizes the source to fill the entire canvas, maintaining its aspect ratio.
• Stretch to Screen: Resizes the source to fill the entire canvas, stretching it if necessary (changes aspect ratio).
• Center to Screen: Centers the source on the canvas without changing its size.

Practical Use Cases for Source Resizing:

• Picture-in-Picture: Easily scale down your webcam and place it in a corner of your game capture.
• Cropping Unwanted UI: Use Alt-drag or the Crop settings in “Edit Transform” to remove chat boxes, watermarks, or black bars from a game capture.
• Fitting Images: Make sure background images or overlays fit precisely without stretching by using “Fit to Screen” or setting exact dimensions.
• Dynamic Layouts: Set up different scene collections for various content types, each with sources resized and positioned for optimal viewing.

Method 2: Adjusting the Base (Canvas) Resolution

This is where you define the fundamental “size” of your entire streaming or recording project. Changing the Base (Canvas) Resolution essentially changes the dimensions of your workspace within OBS. It’s a foundational setting, and it’s typically set once and rarely changed unless you’re moving to a significantly different monitor setup or targeting a niche output format.

What it is and Why You’d Change It

As we discussed, the Base Resolution is your internal working resolution. It determines how much screen real estate you have to arrange your sources. For most modern setups, this will usually match your primary monitor’s resolution (e.g., 1920×1080, 2560×1440, or even 3840×2160 for 4K). You’d typically change this if:

• You get a new monitor with a higher or lower resolution.
• You’re trying to create content specifically for a vertical format (like TikTok or YouTube Shorts), where you might set your Base Resolution to something like 1080×1920.
• You want to work with a different aspect ratio for creative reasons.

Detailed Steps to Change Base (Canvas) Resolution:

1. Open OBS Settings: In the bottom-right corner of OBS Studio, click the “Settings” button.
2. Navigate to the “Video” Tab: In the Settings window, click on “Video” in the left-hand menu.
3. Locate “Base (Canvas) Resolution”: This is the first option you’ll see under the “Resolution” section.
4. Select or Manually Enter:
   • You can click the dropdown menu and select a common resolution that matches your monitor.
   • Alternatively, you can manually type in custom width and height values (e.g., 1080 for width, 1920 for height for a vertical canvas).
5. Confirm Changes: Click “Apply” then “OK.” OBS will prompt you to confirm if you want to keep the new resolution. Your entire preview window and all your sources will instantly adjust to fit the new canvas size.

Impact on Scene Elements

When you change your Base Resolution, all your existing sources will scale proportionally to fit the new canvas size. If you go from a smaller canvas to a larger one, your sources will appear smaller relative to the new canvas. If you go from a larger canvas to a smaller one, they’ll appear larger and might even spill off the canvas. You’ll likely need to readjust the size and position of your individual sources using Method 1 after changing your Base Resolution to get them looking right again.

Method 3: Adjusting the Output (Scaled) Resolution

While your Base Resolution defines your workspace, the Output (Scaled) Resolution defines what your viewers actually see or what gets written to your recording file. This is crucial for optimizing your stream’s performance and quality, especially when you need to send a signal over the internet.

What it is and Why You’d Change It

The Output Resolution is the final pixel dimensions of your stream or recording. Often, especially if you have a powerful PC and a great internet connection, you might want your Output Resolution to match your Base Resolution (e.g., 1080p Base to 1080p Output). However, for many streamers, downscaling is a common practice.

You’d change your Output Resolution primarily for these reasons:

• Bandwidth Constraints: Streaming at lower resolutions (like 720p or 480p) requires significantly less internet bandwidth, making your stream more stable for you and more accessible for viewers with slower connections.
• PC Performance: Encoding a 1080p or 1440p stream is more CPU/GPU intensive than encoding a 720p stream. Downscaling can free up system resources, leading to smoother gameplay and a more stable stream.
• Platform Requirements: Some platforms or affiliate/partner tiers might have specific recommendations for output resolutions and bitrates.

Detailed Steps to Change Output (Scaled) Resolution:

1. Open OBS Settings: Click the “Settings” button in the bottom-right of OBS Studio.
2. Navigate to the “Video” Tab: Select “Video” from the left-hand menu.
3. Locate “Output (Scaled) Resolution”: This is the second option under the “Resolution” section.
4. Select from Dropdown: Choose a common resolution from the dropdown menu (e.g., 1920×1080, 1280×720, 852×480). It’s generally recommended to choose a resolution that maintains the same aspect ratio as your Base Resolution to avoid black bars or stretching.
5. Choose a Downscale Filter: This is a critical step! When your Output Resolution is smaller than your Base Resolution, OBS needs to “shrink” the image. The downscale filter determines *how* it does that. This really impacts the visual quality of your downscaled video.
• Bilinear (Fastest, but Blurry): This is the least demanding filter on your system, but it produces the blurriest result. It’s usually only recommended if you’re struggling with performance and absolutely need every ounce of CPU/GPU you can get. Not ideal for sharp details.
• Bicubic (Sharpened Scaling, 16 Samples): This is often considered the best balance between performance and quality. It provides a good level of sharpness without being overly demanding. For most streamers downscaling from 1080p to 720p, Bicubic is an excellent choice.
• Lanczos (Sharpened Scaling, 36 Samples): This filter provides the sharpest downscaled image quality but is also the most demanding on your CPU/GPU. If your system can handle it, Lanczos will give you the cleanest, most detailed output when downscaling. I personally use Lanczos whenever my PC can comfortably manage it because the difference in clarity can be quite noticeable, especially with text or fine game details.
6. Confirm Changes: Click “Apply” then “OK.”

Impact on Streaming/Recording Quality and File Size

• Streaming: A lower Output Resolution means less data needs to be sent, leading to a more stable stream for viewers and less strain on your internet. However, if you downscale too much (e.g., to 480p from a 1080p base), your stream might look pixelated or lack detail, even with the best downscale filter.
• Recording: Lower Output Resolution results in smaller file sizes, which can be easier to manage and upload. Again, the trade-off is often in visual detail. For local recordings, if your system can handle it, I always recommend recording at your Base Resolution (or even higher if you plan on heavy editing or zooming in post-production) for maximum flexibility.

Optimizing Your Video Resizing in OBS: Best Practices

Now that you’ve got the technical bits down, let’s talk about how to apply these concepts to get the best possible results for your streams and recordings.

Aspect Ratio Considerations: Maintaining the Look

The aspect ratio is the proportional relationship between the width and height of your video. The most common aspect ratio today is 16:9 (widescreen), used for most monitors, TVs, and YouTube videos. Other common ones include 9:16 (vertical video for TikTok, Shorts) and 4:3 (older TVs, some retro games). It’s generally best practice to maintain a consistent aspect ratio throughout your OBS setup:

• Match Base and Output: Always try to set your Output (Scaled) Resolution to match the aspect ratio of your Base (Canvas) Resolution. If your Base is 1920×1080 (16:9), then a 1280×720 (also 16:9) output is perfect. Don’t go from 16:9 to, say, a 4:3 output unless you explicitly want black bars or distortion.
• Source Aspect Ratios: When resizing individual sources, always try to use standard scaling (just drag the corners) to maintain the source’s original aspect ratio. Only use Shift-drag if you intentionally want to stretch or squish.

Performance Impact: Don’t Overburden Your Rig

Resizing, especially downscaling with complex filters like Lanczos, requires computational power. If your CPU or GPU is already struggling with gaming or other tasks, adding heavy downscaling can push it over the edge, leading to dropped frames or encoding lag. Here’s what to keep in mind:

• Monitor Your Stats: Keep an eye on the bottom bar of OBS. It shows your CPU usage and dropped frames. If these numbers are consistently high, you might need to adjust your settings.
• Encoder Matters: Your chosen encoder (x264 for CPU, NVENC for NVIDIA GPUs, AMF/VCE for AMD GPUs) plays a massive role. Hardware encoders (NVENC/AMF) are generally more efficient for streaming and recording, offloading the work from your main CPU.
• Test, Test, Test: Before you go live, always do a test recording or a private test stream to check your performance and visual quality.

Common Resolutions and Their Uses

Here’s a quick rundown of popular resolutions and when you might use them:

Cropping vs. Scaling: When to Use Which

This is a frequent point of confusion. Remember the Alt-drag trick for cropping? It’s super useful. Here’s the distinction:

• Scaling (Resizing): Changes the overall size of the source, making it bigger or smaller. It keeps all of the original content visible (unless it’s scaled so small you can’t see it). Use this for making your webcam fit in a corner or making your game capture fill the screen.
• Cropping: Cuts off portions of the source from the edges, making those parts invisible. The remaining portion retains its original pixel density relative to its original size. Use this to remove unwanted parts of a capture (e.g., a desktop taskbar, a game’s watermark, or extra background from your webcam feed).

You can (and often should) use both! For example, you might crop your webcam to remove a messy background, then scale it down to fit neatly in your stream layout.

Handling Black Bars (Pillarboxing/Letterboxing)

Black bars appear when your video’s aspect ratio doesn’t match the display’s aspect ratio. This is called letterboxing (horizontal bars top/bottom) or pillarboxing (vertical bars left/right).

• Avoidance: The best way to avoid unwanted black bars is to maintain a consistent aspect ratio across your Base, Output, and primary sources. If your game outputs at 16:9, ensure your Base and Output are also 16:9.
• Intentional Use: Sometimes, black bars are intentional for stylistic reasons (e.g., to mimic a cinematic look, or to fit a 4:3 retro game into a 16:9 stream). In such cases, ensure your source is scaled “Scale to Inner Bounds” or manually sized within your 16:9 canvas.
• Filling Black Bars: If you have black bars around a source (like a 4:3 game on a 16:9 canvas), you can fill them with a background image or a blurred version of the game itself (by duplicating the source, applying a blur filter, scaling it to fill, and placing it underneath).

Troubleshooting Common Resizing Issues

Even with all the knowledge, things can sometimes go awry. Here are some common issues and how to tackle them.

“My video looks blurry!”

This is a classic. There are a few culprits:

• Upscaling: If you take a small source (e.g., a 720p webcam) and stretch it to fill a much larger area (e.g., a 1080p canvas), it will inevitably look blurry and pixelated because OBS has to “guess” at the extra pixels. Try to use sources that are at least the size you intend to display them, or only scale down.
• Incorrect Downscale Filter: If your Output (Scaled) Resolution is lower than your Base, and you’ve selected “Bilinear” as your downscale filter, your output will look noticeably softer. Switch to “Bicubic” or “Lanczos” (if your PC can handle it) in Settings -> Video.
• Low Bitrate: While not strictly a resizing issue, a very low bitrate for your chosen resolution can make your stream/recording look blocky and blurry, especially with lots of motion. Check your Settings -> Output -> Streaming/Recording tab.

“My game doesn’t fill the screen.”

This usually means there’s a mismatch between your game’s resolution/aspect ratio and your OBS canvas. Here’s a quick checklist:

• Game Resolution: Make sure the game itself is set to output at a resolution that matches your OBS Base (Canvas) Resolution.
• Source Scaling: Select the game capture source in OBS. Right-click it, go to Transform, and select “Fit to Screen” or “Stretch to Screen” if you don’t mind distortion.
• Check Game Capture Properties: Sometimes, specific game capture methods (Window Capture vs. Game Capture) can behave differently. Ensure the capture method is correctly configured to capture the entire game window.

“OBS is dropping frames after I changed resolution.”

Increasing your Base or Output Resolution, or using a more demanding downscale filter (like Lanczos), increases the workload on your system. Dropped frames are a clear sign your PC can’t keep up. Solutions:

• Lower Output Resolution: Try reducing your Output (Scaled) Resolution (e.g., from 1080p to 720p).
• Change Downscale Filter: If you’re using Lanczos, switch to Bicubic. If you’re on Bicubic and still struggling, consider Bilinear as a last resort (though quality will suffer).
• Reduce Bitrate: While not ideal for quality, reducing your bitrate (Settings -> Output) can sometimes alleviate pressure.
• Check Encoder: Ensure you’re using a hardware encoder (NVENC or AMF/VCE) if your GPU supports it, as these are generally more efficient than x264 (CPU-based).
• Close Background Programs: Free up system resources by closing any unnecessary applications.

“I have black bars I don’t want.”

These typically appear due to aspect ratio mismatches. For example, if you capture an old 4:3 game but stream at 16:9, you’ll see pillarboxing (vertical bars). To fix this:

• Resize Source: Select the source, right-click -> Transform -> “Stretch to Screen” (if you don’t mind distorting the source to fill).
• Crop Source: Use Alt-drag or “Edit Transform” to crop the source if the black bars are actually part of the capture itself (sometimes games capture with their own internal black bars).
• Adjust Base/Output: Ensure your Base and Output resolutions maintain a consistent aspect ratio.
• Consider Source Aspect Ratio: If a source inherently has a different aspect ratio, you’ll either have to stretch it, crop it, or live with the black bars and potentially fill them with a background.

Advanced Tips for Resizing and Layout

Once you’ve mastered the basics, here are a few advanced techniques to further refine your OBS layouts and resizing workflow.

Using the “Projector” Feature for Pre-Visualization

This is one of my favorite underused features! A projector allows you to preview a scene or your full program output on a separate monitor or window, even while you’re still configuring things in the main OBS interface. This is awesome for:

• Checking Aspect Ratios: See exactly how your stream will look on a typical monitor.
• Layout Precision: Get a full-screen view of your layout without the OBS interface clutter.
• Dual PC Setups: If you’re sending your OBS output to a second PC, you can use a projector to see what’s being sent.

To use it: Right-click anywhere in the OBS preview window, or on a specific source or scene in its dock, and select “Full Screen Projector (Program)” or “Windowed Projector (Scene).”

Scene Nesting (Using One Scene as a Source)

This is a powerful organizational and resizing tool. You can create a scene, put several sources in it, arrange them perfectly, and then add *that entire scene* as a source in *another* scene. Why would you do this?

• Modular Layouts: Create a “Webcam + Overlay” scene, then use that as a single source in all your “Gaming,” “Just Chatting,” and “BRB” scenes. If you need to resize your webcam or adjust its overlay, you only do it once in the nested scene, and it updates everywhere.
• Complex Resizing: Apply global scaling or cropping to a group of sources simultaneously by nesting them in a scene and then resizing the nested scene.

To do this: In your “Sources” dock, click the “+” icon, select “Scene,” then choose an existing scene from the dropdown. It will appear as a single source you can then resize and move.

Keyboard Shortcuts for Transform Actions

Speed up your workflow by using hotkeys for common transform actions. You can customize these in Settings -> Hotkeys.

• Fit to Screen: Assign a key to instantly make a selected source fill the canvas.
• Center to Screen: A quick way to center a source.
• Reset Transform: Invaluable for quickly reverting a source to its original state.

Frequently Asked Questions (FAQs)

Can I resize a recorded video *in OBS*?

No, OBS Studio is primarily a live streaming and recording software. It does not have built-in video editing capabilities to change the resolution or crop a video file *after* it has been recorded. Once your video is saved to your hard drive, its resolution is fixed at whatever your Output (Scaled) Resolution was set to during the recording process.

To resize a recorded video, you would need to use a dedicated video editing software like Adobe Premiere Pro, DaVinci Resolve, Shotcut, or even free tools like HandBrake for re-encoding and resizing. These tools allow you to change resolution, crop, add black bars, or adjust aspect ratios post-production.

What’s the best downscale filter for general use?

For general use, especially when downscaling from 1080p to 720p, Bicubic (Sharpened Scaling, 16 Samples) is almost always your best bet. It strikes an excellent balance between visual quality and performance impact.

If your PC has plenty of spare resources (a powerful CPU or a dedicated streaming PC), and you want the absolute sharpest downscaled image, then Lanczos (Sharpened Scaling, 36 Samples) is superior. However, it uses more processing power. Avoid Bilinear unless you are experiencing severe performance issues, as it makes the video noticeably blurrier.

Why does my video look stretched/squished?

Your video looks stretched or squished because of an aspect ratio mismatch. This happens when the proportional relationship between the width and height of your video source doesn’t align with the area you’re trying to display it in.

For example, if you’re trying to display a 4:3 (square-ish) video on a 16:9 (widescreen) canvas and you force it to fill the entire screen, it will stretch horizontally. To fix this, always try to maintain the source’s original aspect ratio when resizing individual sources (by dragging corners without holding Shift). If you need to fit a different aspect ratio source into your canvas, you might have to accept black bars (letterboxing or pillarboxing) or strategically crop the source to remove unwanted parts while maintaining its native aspect ratio.

Should I change my Base or Output resolution first?

You should generally establish your Base (Canvas) Resolution first, setting it to match the native resolution of your primary monitor (e.g., 1920×1080 or 2560×1440). This gives you the largest possible workspace for arranging your sources without losing detail. Think of it as setting the maximum quality you’re working with.

Then, set your Output (Scaled) Resolution. If your internet and PC can handle it, you can match your Output to your Base Resolution for the highest quality stream/recording. If you need to conserve bandwidth or system resources, you would then downscale your Output Resolution (e.g., to 1280×720) while keeping your Base Resolution high. This approach ensures you’re composing your scenes at the best possible quality before OBS scales it down for the final output.

How do I make my stream fit my vertical monitor?

To make your stream fit a vertical monitor or to create content for platforms like TikTok or YouTube Shorts that use a vertical format (9:16 aspect ratio), you need to adjust your Base (Canvas) Resolution accordingly. Instead of the typical 1920×1080, you would invert these dimensions to 1080×1920. This changes your entire OBS canvas to a vertical orientation.

After setting the Base Resolution, you’ll then need to adjust and arrange your sources (webcam, game capture, chat, etc.) to fit this new vertical canvas. You’ll likely want to set your Output (Scaled) Resolution to match your Base (1080×1920) and use a suitable downscale filter, just like you would for a horizontal stream. Remember that horizontal games will naturally have significant letterboxing if you capture them on a vertical canvas, so you’ll often need to zoom in or choose specific content that lends itself well to a vertical presentation.

Does resizing affect audio quality?

No, resizing video in OBS Studio does not affect audio quality. Video resizing operations (changing resolutions, cropping, scaling, downscale filters) only pertain to the visual components of your stream or recording. Audio is handled completely separately in the OBS audio mixer, with its own settings for sample rate, channels, and bitrate.

You might experience *overall* performance issues that could *indirectly* lead to audio problems like crackling or desynchronization if your system is severely overburdened. However, the act of resizing video itself does not directly degrade audio fidelity.

How do I crop a specific part of a source?

There are two primary ways to crop a specific part of a source in OBS Studio, and both are super useful:

1. Alt-Drag Method (Quick & Visual):
   • Select the source you want to crop in your scene preview.
   • Hold down the Alt key (or Option key on Mac) on your keyboard.
   • Click and drag one of the red bounding box handles (corners or sides) inwards. You’ll notice the color of the bounding box might change to green to indicate you’re cropping.
   • Release the mouse button when you’ve cropped the desired amount.
2. Edit Transform Method (Precise & Numerical):
   • Right-click on the source in your “Sources” dock or directly in the preview window.
   • Go to Transform -> Edit Transform.
   • In the “Edit Transform” window, locate the “Crop” section.
   • Here, you can input exact pixel values for Left, Top, Right, and Bottom to precisely define how much you want to crop from each side. This is perfect for pixel-accurate cropping.
   • Click “Close” or “OK” to apply the changes.

Cropping is fantastic for removing black bars, toolbars, or any other unwanted elements around the edges of your game capture, webcam, or desktop display.

Conclusion

Phew! We’ve covered a whole lot about how to resize a video in OBS Studio, haven’t we? From the simple drag-and-drop actions to the nuanced settings of Base and Output resolutions and those critical downscale filters, you’ve now got the tools and understanding to tackle pretty much any video sizing challenge OBS throws your way. Remember Sarah, my friend, at the beginning? With this knowledge, she could have quickly adjusted her webcam, cropped out the messy part of her desk, and then effortlessly integrated it into her 1080p stream without a hitch.

The key takeaway here is that OBS gives you incredible control, but with that control comes a few layers of settings to understand. Don’t be afraid to experiment! Play around with the different transform options, try out the various downscale filters, and adjust your resolutions to see what works best for your specific setup and content. Always remember to test your settings, perhaps with a local recording, before going live, so you can catch any issues beforehand.

Getting your video sizing perfect in OBS isn’t just about making things look good; it’s about optimizing your performance, ensuring your content is crystal clear, and making sure your viewers have the best possible experience. You’ve now got the knowledge to make OBS work for you, creating beautiful, perfectly sized content every single time. So go forth, experiment, and make some amazing streams and videos!