Observed Signal · Jun 25, 2026 · Product Launch · Source: DEV Community · Impact: 1/5 · Sentiment: Neutral
ffmpeg Pipeline and Bot to Convert iPhone HEVC for Telegram Avatars
A technical how-to describing why iPhone HEVC (.mov) clips fail as Telegram profile videos and providing a reproducible ffmpeg two-pass pipeline (crop detection then encode) to produce 800x800, H.264 MP4, yuv420p, no-audio clips under 10 seconds and ~2MB. The author shows ffmpeg commands, an aiogram 3 handler that runs ffmpeg as a subprocess, discusses edge cases (Dolby Vision/HDR metadata, 10-bit inputs, GIF frame rates, vertical TikTok cropping), and packages the tool as a Telegram bot called LiveAvaBot (t.me/LiveAvaBot) offering conversions with a small payment after initial free usage. Publication date: 2026-06-25.
A practical developer tutorial and small bot release useful for Telegram users and developers, but it has limited, narrow impact on the broader AdTech/MarTech industry.
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Key Takeaways & Evidence Grounding
- iPhone records video as HEVC (H.265) inside a .mov container by default, which Telegram's profile-video spec does not accept.
- Telegram profile videos must be H.264 (libx264) in an MP4 container (+faststart), 800x800 exact square, yuv420p, up to 10 seconds, no audio, and generally under ~2 MB.
- The author provides a two-pass ffmpeg pipeline: a crop-detection pass using cropdetect, then an encode pass with crop, scale to 800x800, format=yuv420p, libx264, movflags +faststart, and -an to strip audio.
- The conversion is integrated into an aiogram 3 Telegram bot handler that runs ffmpeg as a subprocess; the author packaged this as LiveAvaBot (t.me/LiveAvaBot) offering conversions (free initial conversions, then a small Telegram Stars payment).
- Edge cases covered include Dolby Vision/HDR metadata (use hevc_metadata bsf), 10-bit inputs (force format=yuv420p), variable-frame-rate GIFs (clamp with -r 30), and face-detection fallback for vertical TikTok crops; the author plans AV1 support later.
Connected Companies & Entities
5 Entities mapped“Telegram's video avatar feature has a very narrow spec, and HEVC isn't part of it....”
“ffmpeg can handle every part of this in one pass....”
“HEVC with HDR metadata. iPhone 12 and newer can record in Dolby Vision....”
“Vertical TikTok exports. The centered crop loses heads when the subject sits in the top third....”
Ontology Mapping & Concepts
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