Video → Audio
MKVtoOpus
Drop your files here
Video, audio, images and documents: MP4, MP3, HEIC, DOCX, PDF and 33 more formats. Several files or a link at once.
Choose files
Why convert
MKV — a container for films and series that holds several audio tracks and subtitles. When you only need the sound from MKV: music, a lecture or a podcast to listen to without a screen. Opus — the voice-message format of Telegram and WhatsApp; good even at low bitrates.
What changes in the file
The picture is dropped and the first audio track is kept. The sound is encoded once more, so keep the bitrate at least as high as the original.
Which settings to pick
Use 128–192 kbit/s for music; 64 is enough for speech.