Container and codec are separate details
A container such as MKV or MP4 can hold different video, audio and subtitle codecs. Inspecting both helps explain compatibility and conversion behavior.
Media tools
Media Info & Codec Inspector
See which container, codecs and streams a media file actually contains before you convert, extract or troubleshoot it.
Your selected media bytes are processed in your browser and are not uploaded to Voice2Sub.
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Use the report for troubleshooting
Copy the readable summary for quick checks or download the raw JSON when you need the underlying probe data.
Need subtitles created automatically from audio or video?Voice2Sub can transcribe spoken audio when you need a complete subtitle workflow instead of a file utility.
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