I Fixed FFmpeg'S Subtitle Conversion (The Bug From 2014)

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FFmpeg Subtitle Tools fixes a long-standing FFmpeg bug, enabling subtitle conversion between any format, including SRT to Blu-ray PGS and PGS to SRT via OCR. It provides ready-to-use binaries for various platforms.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is I fixed FFmpeg's subtitle conversion (the bug from 2014)?

FFmpeg Subtitle Tools addresses a critical bug (FFmpeg #3819) that has prevented subtitle encoding between different types since 2014. This tool provides pre-built binaries that act as a drop-in replacement for existing FFmpeg installations, enabling 88 new format conversions. Key capabilities include converting SRT/ASS/WebVTT to Blu-ray PGS, and PGS/DVD/DVB bitmap subtitles to SRT using OCR, supporting 114 languages. It also preserves animation, color changes, and movement in styled subtitles (ASS/SSA) when converting to Blu-ray PGS, automatically detecting these elements without manual tagging. Additionally, it allows direct RGBA-to-GIF encoding without complex filter pipelines.

Best used for

Ideal for video professionals and developers who need to convert subtitles between various formats, including text-based to bitmap and vice-versa. Especially valuable for authoring Blu-ray discs with styled subtitles or extracting text from existing video content using OCR, overcoming previous FFmpeg limitations.

Common actions

convert subtitles

fix FFmpeg bugs

OCR subtitles

encode video

bug fixPGS subtitlesopen-sourcesubtitle conversionmedia developmentFFmpegvideo processing

Capabilities

Key features

Fixes FFmpeg subtitle bug
SRT to Blu-ray PGS conversion
PGS to SRT via OCR
Preserves animated subtitles
114 OCR languages supported
RGBA to GIF encoding
Ready-to-use binaries

Target Audience

video editorsdevelopersmedia professionalsarchivists

Integrations

Not yet documented

Pricing & Plans

Open Source

FAQs

What specific FFmpeg bug does this tool address?

This tool specifically fixes FFmpeg bug #3819, which prevented subtitle encoding between text and bitmap formats, and vice-versa, since 2014. It also adds a PGS encoder (FFmpeg #6843) to enable these conversions.

How does this tool handle animated or styled subtitles?

When converting styled subtitles (ASS/SSA) to Blu-ray PGS, the encoder automatically detects and preserves animation, color changes, and movement. This eliminates the need for manual tagging or frame-by-frame export, ensuring accurate conversion.

What are the system requirements for using these FFmpeg builds?

The tool provides binaries for Linux x86_64 (glibc 2.17+), Linux arm64 (glibc 2.17+), macOS x86_64 (10.14+), macOS arm64 (11+), Windows x86_64 (10+), and Windows arm64 (11+). They are designed as drop-in replacements with no additional dependencies.

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