Why is my video stuttering when exporting in 4K?
I'm trying to export a video in 4K with OBS, but the file comes out super stuttering and the quality is terrible. My PC has an RTX 4060 and 32GB RAM, shouldn't that be enough? What am I doing wrong?
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Are you using a codec that your graphics card can actually accelerate, or are you trying to force something that won't work?
The RTX 4060 is basically powerful enough for 4K, but the problem usually isn't the hardware itself - it's your export settings! With OBS, you need to make sure you're using the right encoder - NVENC would be ideal (that's your Nvidia card's hardware acceleration). If you're using x264 or x265 in CPU mode instead, your processor has to handle it all alone, and even with 32GB RAM that'll be extremely slow and choppy at 4K. Check your Output settings and see which encoder is active!
Two other things to check: First, your bitrate - with 4K you might be trying to save way too little data per second, which leads to awful quality. Try a higher bitrate (something like 50-80 Mbps and up, depending on your content). Second, your framerate - does it match between export and recording, or are there mismatches? If you're recording at 60fps but exporting at 30fps, you'll get stuttering! Find a good balance with a high bitrate, the right encoder, and consistent framerate, and it should work!
The RTX 4060 can actually handle 4K just fine, so the problem's somewhere else. When your video stutters during export, it's usually because the bitrate is set way too low or your CPU can't keep up - that happens pretty quickly with OBS if you're using the wrong encoder settings. Check whether you've got NVENC enabled (that's GPU acceleration) and you're not accidentally exporting with the software encoder (x264). Otherwise it'll slow you down brutally.
Also look at your bitrate - for smooth 4K you need at least 50 - 80 Mbps depending on framerate, more if you want high quality. If it's way too low, the video's gonna look like a mosaic. And make sure OBS isn't also rendering other effects at the same time or your system's getting hammered with something else. Your SSD's write speed can matter too - if it's too slow, you'll get stuttering. Try testing with lower settings to see if it's actually an encoding issue or if something else in your system is acting up.
With 4K export in OBS, stuttering often comes down to the wrong bitrate or encoding settings that don't match your hardware. The RTX 4060 is more than enough, but you've got to use it right - make sure you're using NVENC (H.264 or H.265) as your encoder and not x264. If you're still having issues, check your bitrate: for 4K you need at least 15-20 Mbps, depending on how complex your video is. I used to get stuttering too, until I realized I'd accidentally switched to CPU encoding instead of GPU.
Another common mistake is the frame rate setting. If you're exporting at 60fps, the load doubles - try starting with 30fps and see if it runs smooth. Also: in OBS settings under Output, "Rescale Output" should be disabled if your monitor is already 4K. And really important - check the Task Manager to see if CPU or GPU is maxing out during export. If the CPU is stuck at 100%, the only fix is lower bitrate or frame rate. GPU load should be more of your problem, and you can just crank that up without worrying.
Have you actually enabled the right encoder setting for your graphics card in the OBS settings, or are you still using the default encoder? What the others already said is correct - bitrate and CPU load really are often the problem - but on top of that, you should check whether you've actually selected NVENC (for your RTX) in OBS under "Output" or if you're still using the software encoder instead. If you're still set to x264 or something like that, your CPU will be choking and your GPU will just sit there doing nothing while everything stutters like crazy.
The problem is probably not your hardware, but rather that you're using the wrong settings or haven't configured OBS properly. 32GB RAM and a 4060 are actually solid for 4K, but a lot of people make the mistake of setting the frame rate too high during export or working with a codec that doesn't run properly on their card.
Check your export settings: Are you actually using NVENC (so the hardware acceleration from your graphics card) and not something with the CPU? With NVENC you should set it to "High Quality" or "Low-Latency High Quality," not Ultra or anything like that. The bitrate is also crucial - for 4K you need at least 50-80 Mbps, depending on how much movement is in the video. Too low and it gets mushy and stuttery. Also test whether your RAM might be maxing out during export - then Windows automatically throttles everything down.
One more thing: If you already recorded the footage itself in low quality or low frame rate, the best export won't help you. Save your raw file in good quality before you export it to 4K.
Check whether you've actually selected "NVENC" as the encoder under "Output" in OBS and haven't accidentally fallen back to "Software (x264)" - that happens faster than you'd think and would completely overload your CPU. One thing hardly anyone mentions: try reducing the framerate to 30fps for export instead of using 60fps, often the video encodes much more smoothly that way, even though it looks the same subjectively. Also check your bitrate - for 4K you need at least 50-80 Mbps, otherwise it'll look mushy no matter how good your hardware is.
You're probably not using the NVENC encoder from your graphics card in OBS, but still using the software encoder instead. Go to the output settings, look for "NVIDIA NVENC" and set that as your encoder - then your 4060 should handle most of it itself and take the load off your CPU. Also important: check your bitrate, at 4K you need at least 50-80 Mbps depending on your desired quality, otherwise it'll look pixelated. If it's still stuttering, try 1440p instead of 4K - sometimes the hard drive is just the bottleneck when writing.
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