Troubleshooting Video Export and Rendering Errors
Fix common video export failures including codec errors, audio sync issues, and rendering crashes.
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Troubleshooting Video Export
Video export failures are frustrating because they often occur after a long rendering process. Understanding common failure modes helps you diagnose and fix issues without starting from scratch.
Out of Memory Errors
Video rendering is memory-intensive, especially at high resolutions with effects. 4K video with complex effects can consume 8GB+ of RAM. Solutions: close other applications during rendering, reduce preview quality (render quality can stay high), render in sections and concatenate afterward, or use proxy editing (edit with low-res proxies, render from full-res originals).
Audio/Video Sync Issues
Sync problems usually originate from variable frame rate (VFR) source footage. Most screen recorders and smartphones record in VFR, where the frame rate varies based on scene complexity. Convert VFR to constant frame rate (CFR) before editing. If sync drift is gradual (audio slowly gets ahead or behind), the frame rate of the timeline doesn't match the source.
Codec Compatibility
The export codec must be supported by your target platform. H.264 is the safest choice for universal compatibility. H.265 (HEVC) produces smaller files but isn't supported everywhere. ProRes is preferred for professional editing workflows but produces very large files. AV1 offers the best compression but encoding is extremely slow.
Color Shift After Export
If exported video looks different from the preview — washed out, oversaturated, or with a color cast — check the color space settings. Editing in Rec. 709 and exporting in Rec. 2020 (or vice versa) causes visible color shifts. Ensure the export color space matches the source and editing color space.
Partial Render Failures
If rendering fails at a specific timestamp, that section likely contains a problematic element: a corrupt source clip, an unsupported effect, or a transition that exceeds available memory. Navigate to the failure point, simplify or remove the problematic element, and re-render. Export logs (if available) indicate the exact frame where failure occurred.
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