fix(ci): pin FFmpeg n7.1 to the 2026-07-31 month-end BtbN release

[keyldev]

• Mid-month autobuild tags are pruned; 2026-08-16 now 404s on Linux/Windows
• 2026-07-31 is the last retained tag that still ships n7.1 (n7.1.5-12)
• SHA-256 updated for both assets, checked against BtbN checksums.sha256

Summary

Related

Type

• Bug fix
• Feature
• Refactor / cleanup
• Docs / CI
• Other:

Checklist

• Builds with 0 warnings (TreatWarningsAsErrors=true).
• Tests pass (dotnet test); new Core logic has unit tests.
• No layering violation — App references Core only (Infrastructure / Video / Devices wired via DI in a head).
• Scope stays within one phase (didn't pull work from a later phase's "Не входит").
• README / docs updated if public commands, options, or setup changed.

Platforms tested

• Windows
• Linux
• macOS
• Android
• iOS
• CI build only

Screenshots / notes

[qodo-free-for-open-source-projects]

PR Summary by Qodo

Restore FFmpeg downloads with retained month-end release pins

🐞 Bug fix ⚙️ Configuration changes 🕐 Less than 10 minutes

AI Description

• Re-pins Linux and Windows FFmpeg downloads to the retained July 2026 month-end release.
• Updates platform-specific asset names and verified SHA-256 checksums.
• Documents why month-end tags prevent CI failures from pruned BtbN releases.

Diagram

graph TD
  CI["CI or Developer"] --> L["Linux Fetcher"] --> R["BtbN Month-End"] --> LA["Linux Archive"] --> LN["Linux Runtime"]
  CI --> W["Windows Fetcher"] --> R
  R --> WA["Windows Archive"] --> WN["Windows Runtime"]

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High-Level Assessment

The month-end pin is the appropriate low-risk fix because it preserves the required FFmpeg n7.1 ABI while avoiding pruned mid-month and mutable rolling releases. Upgrading FFmpeg bindings or mirroring artifacts would add substantially broader maintenance scope without improving this immediate CI repair.

Files changed (2) +16 / -11

Bug fix (2) +16 / -11

fetch-ffmpeg-linux.shPin Linux FFmpeg to retained July month-end build +8/-6

Pin Linux FFmpeg to retained July month-end build

• Changes the default Linux release and asset from the pruned August build to the retained July 31 n7.1.5-12 archive. Updates its verified SHA-256 checksum and explains BtbN's month-end retention behavior.

tools/fetch-ffmpeg-linux.sh

fetch-ffmpeg.ps1Pin Windows FFmpeg to retained July month-end build +8/-5

Pin Windows FFmpeg to retained July month-end build

• Changes the default Windows release and asset to the retained July 31 n7.1.5-12 archive. Updates the platform-specific SHA-256 checksum and documents why mid-month tags are unsuitable for stable automation.

tools/fetch-ffmpeg.ps1

[qodo-free-for-open-source-projects]

Code Review by Qodo

🐞 Bugs (0) 📘 Rule violations (0) 📎 Requirement gaps (0)

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