I tend to hard cut m2ts using a binary file cutter -- it preserves the file structure.
You can just cut, for example, 200 megabytes from the beginning, reproduce against it and then upload.
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My Projects
x265 - Yuuki-Asuna-mod
TS - ADTS AAC Splitter | LATM AAC Splitter | BS4K-ASS
Neo AviSynth+ filters - F3KDB | FFT3D | DFTTest | MiniDeen | Temporal Median
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