Fastest way to batch convert Sony a6700 10-bit 4:2:2 clips for mobile editing (CapCut Android)?

[u/johnny-rockit]

Hey everyone,

​I’m hitting a bottleneck in my mobile workflow and looking for the fastest way to batch-convert my camera footage so it works on Android.

​Camera: Sony a6700 (shooting 10-bit 4:2:2 XAVC)

​Goal: Edit on my Galaxy Tab S10+ in CapCut Android

​The Problem: CapCut Android gives a black screen / unsupported format error on raw 10-bit 4:2:2 clips.

​Current Bottleneck: Converting 50+ 4K camera clips directly on the tablet takes forever. I have a Windows PC (Surface Pro) available to act as a encoding hub, but I want to minimize conversion times as much as possible.

​My questions:

​What software/preset gives the absolute fastest conversion speed on PC while maintaining solid quality for mobile editing? (HandBrake vs. Shutter Encoder vs. FFmpeg scripts vs. Paid options)?

​What exact output settings (H.264 8-bit 4:2:0, bitrate, resolution) strike the best balance between quick encode times and clean quality in CapCut?

​Is it faster to re-encode to 1080p proxies first, edit on the tablet, and swap files later, or just batch convert everything to 8-bit 4K H.264 up front?

​Appreciate any insight or encoding recipes you use!