Add --frames-between CLI parameter to configure frame extraction frequency

[Copilot]

The frame extraction frequency was hardcoded as const FRAMES_BETWEEN_EXTRACTED: usize = 30. This adds a CLI parameter to make it configurable.

Changes

• Added --frames-between CLI argument (default: 30) to Args struct
• Updated decode_frames_dropping() signature to accept frames_between_extracted: usize parameter
• Removed unused constant FRAMES_BETWEEN_EXTRACTED

Usage

# Extract 1 frame per second (30fps video, default behavior)
cargo run -- --file video.mp4

# Extract 2 frames per second
cargo run -- --file video.mp4 --frames-between 15

# Extract 1 frame every 2 seconds
cargo run -- --file video.mp4 --frames-between 60

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• esm.ubuntu.com
  • Triggering command: /usr/lib/apt/methods/https /usr/lib/apt/methods/https target/debug/dep--64 )) target/debug/dep/tmp/ffconf.Vz7EkgnV/test.o targ�� target/debug/deps/clap_derive-96_XOPEN_SOURCE=600 target/debug/deps/clap_derive-96-D known-linux-gnu/bin/rustc target/debug/depas target/debug/dep-W target/debug/dep--64 known-linux-gnu/-o targ�� target/debug/dep/tmp/ccVAYD0K.s target/debug/deps/clap_derive-9613d7cca2c4cfe7.clap_derive.2622d56524668ef7-cgu.14.rcgu.o -1949cf8c6b5b557f/icu_normalizer_data-2.0.0/src/lib.rs /extract-frames/cat -incompat /extract-frames/target/debug/deps/tracing_attrib--64 /extract-frames/target/debug/deps/tracing_attrib-o (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Add ability to change const FRAMES_BETWEEN_EXTRACTED: usize = 30; in CLI</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add ability to change const FRAMES_BETWEEN_EXTRACTED: usize = 30; in CLI #55

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