[Andretuta]

Problem

A translated burn failed for a clip whose title contained a comma. FFmpeg exited with a filter parse error, and the clip was left without its burned-in captions. The translated output is named after the clip's title, so the comma reached the filtergraph.

Cause

Each renderer passes the captions file's bare name to the subtitles= filter, with cwd set to the captions' folder to avoid Windows drive-letter escaping. The name itself went into the filtergraph unescaped. FFmpeg then reads a , as the start of the next filter, and ', [, ] and ; cause the same failure. A name such as a=b.ass fails too: FFmpeg reads a as an option key ("Option not found"). This affects all eight call sites:

• multilingual/burn.py
• video/cropper.py (4 sites)
• video/cutter.py
• gaming/compose.py
• video_editor/export.py

Fix

A single helper, video.filters.subtitles_filter(name), applies FFmpeg's documented two-level escaping from "Notes on filtergraph escaping":

1. The option value: \ ' : =
2. The filtergraph: \ ' [ ] , ;

All eight call sites now use it. Nothing else changes: callers still pass a bare name and still set cwd.

Tests

tests/test_subtitles_filter.py checks:

• the exact escaped string for a name with , ' [ ] ; :;
• the exact escaped string for a name with =;
• that a plain name is returned unchanged;
• a real FFmpeg run that burns captions from a file named Corte, do 'Paulinho' [GTA]; parte 1.ass. Two more real runs use a=b.ass and GTA=top, do 'Paulinho' [x]; parte 1.ass. These cases are skipped when FFmpeg is not installed.

ruff check is clean on the touched files. The existing tests for these modules (21 files) pass.

🤖 Generated with Claude Code

[vercel]

@Andretuta is attempting to deploy a commit to the Clips Studio Team on Vercel.

A member of the Team first needs to authorize it.

[ColinGPT9]

thank you where did you download this version of the app, because this bug was found when I was updating the editor but the new editor isn't in the release yet I am still not finished it.

[ColinGPT9]

also I can't merge till I am finished the editor it's taking longer than I expected

[ColinGPT9]

i thought i clicked an issue and not a pull request when I first opened this btw lol. I am tired