A question I keep seeing in different forms: an HEVC action-camera file plays acceptably in a media player, but the editor becomes sluggish as soon as you scrub, add a second track or apply color correction.
How do you decide whether the right fix is a codec/decoder change, proxies, or a full transcode? I am trying to avoid converting hundreds of gigabytes unless it is actually necessary.
Codecs & export
I separate playback from editing load. A player can decode one stream sequentially. An editor may need random seeks, multiple frames for effects, audio waveforms, thumbnails and several layers at once. So “it plays” does not prove the machine will edit it comfortably.
My first test is hardware decoding. If the editor can use the GPU for that exact HEVC profile and bit depth, enable it and compare. If the timeline is still the bottleneck, proxies are usually less destructive than transcoding the masters.
Editing workflows
That is also how I would test it in VSDC: first make sure hardware decoding is active, then generate proxies for the demanding clips if native scrubbing is still poor. The important point is that proxies are editing media, not replacement masters.
A full transcode makes sense when the source format is genuinely incompatible with the rest of the workflow, when another application must receive an intermediate codec, or when repeated decoding of the camera codec is unreliable. For ordinary timeline performance, I would not start there.
Action Video Lab Editorial Team
Storage is another reason I prefer proxies. If I convert every high-resolution source into a large intermediate, I can easily double or triple the project size. A small proxy set on the SSD gives me fast editing while the originals can stay on the larger archive drive.
The only thing I verify early is relinking. I want to know before a long edit that the project really switches back to the full-quality originals for export.
Creator workflows
A useful diagnostic sequence seems to be:
1. Test the untouched camera file.
2. Confirm the HEVC decoder and GPU path.
3. Lower preview quality if the editor offers that option.
4. Generate one proxy and compare responsiveness.
5. Only then consider a master transcode.
That also tells you where the bottleneck is. If a proxy is smooth, the problem was almost certainly decode or media throughput rather than a corrupt camera file.
Codecs & export
This distinction helped me. On my older laptop the original clip was choppy, but a proxy of the same clip scrubbed instantly. Export from the original still completed correctly.
So I am going to stop using “bad playback” as a reason to convert everything. For this machine, proxies are clearly the cheaper fix.
Outdoor action-camera workflows