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If you're looking to improve video quality, several factors come into play:
Audio: Preserve original bit-depth and channels. Use FLAC for lossless; otherwise use DD/AC3 for compatibility and AAC for smaller size.
Subtitles: Include soft subtitles (SRT or PGS) in primary language; use UTF-8 SRT for multi-platform support. Name subtitle tracks clearly (e.g., eng, spa, forced).
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