[krakotay]

• I have disclosed use of any AI generated code in my commit messages.
  • If you are using an LLM, and do not fully understand the changes it is making to the code base, do not create a PR.
  • In our experience, AI generated code often results in overly complex code that lacks enough context for a proper fix or feature inclusion. This results in considerably longer code reviews. Due to this, AI authored or partially authored PRs may be closed without comment.
• I understand these changes in full and will be able to respond to review comments.
• My change is accurately described in the commit message.
• My contribution is tested and working as described.
• I have read the Developer Certificate of Origin and certify my contribution under its conditions.

Some videos on my PC, like this one, previously wouldn't play:
https://github.com/user-attachments/assets/b329351b-a947-4f67-944c-ad53c6aa6894
Other videos suffered from severe audio playback issues. Both problems are now fixed.
Some malformed MP4 files previously wouldn't play at all because they reported a 0/1 framerate.
Other files suffered from severe audio stuttering caused by repeated long GAP events emitted from malformed edit lists.
This patch treats invalid framerates as unknown (allowing the existing fallback to be used) and suppresses suspicious long audio GAP events before they reach the audio sink.
As a result, both kinds of videos now play correctly.

[krakotay]

@mmstick due to wash2/iced_video_player#3 merged, the PR is ready for review now

[leviport]

Regression testing passed:

File Operations

• Selecting a folder with Open media folder opens the directory in the folder pane
• Selecting media from the folder pane works
• Open recent media contains a list of recently opened media

Navigation

• A-B repeat works with video and audio files
• A-B frame stepping works in video files
• General media navigation keybinds work and correctly update the timestamp where applicable