Developer builds Telegram bot to fix silent iPhone video avatar upload failures

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iPhone videos recorded in HEVC (H.265) format silently fail when uploaded as Telegram profile videos because the platform only accepts H.264 codec, with no error message shown to users. The issue has persisted since iOS 11, which made HEVC the default recording format, leaving users unaware of the incompatibility. A developer investigated the undocumented requirements — including H.264 codec, yuv420p 8-bit pixel format, square aspect ratio, 10-second maximum duration, and no audio track — through repeated upload testing. Using ffmpeg, the developer built a conversion pipeline that transcodes iPhone footage to meet all these specifications, including stripping 10-bit HDR color that causes green rendering glitches on some clients. The solution was packaged as a publicly accessible Telegram bot built with the aiogram 3 Python library, handling videos, GIFs, and video files sent as documents.

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