What are video streams?

A video file is not just a single video — it is a container holding multiple "streams": one or more video tracks, multiple audio tracks (e.g. English and Chinese dubs), and subtitle tracks (e.g. English and Chinese subtitles). All these streams travel together inside one file such as MKV or MP4.

When you convert such a file, what happens to those extra audio and subtitle tracks?

What happens after conversion?

Input file
🎬 Video 🔊 Audio (EN) 🔊 Audio (ZH) 💬 Subtitle (EN) 💬 Subtitle (ZH)
↓ convert ↓
Other converters
🎬 Video 🔊 Audio (EN) ✕ Audio (ZH) ✕ Sub (EN) ✕ Sub (ZH)
BeeConvert ✓
🎬 Video 🔊 Audio (EN) 🔊 Audio (ZH) 💬 Sub (EN) 💬 Sub (ZH)

Most tools keep only the first video track and the first audio track. All other audio tracks and all subtitles are silently removed — you won't even get a warning.

★ Only BeeConvert preserves all streams

BeeConvert preserves every stream: all video, audio, and subtitle tracks remain in the output — perfectly synchronized and intact, just like in the original file.

Why does this matter?

  • Watching a foreign film with bilingual audio: if the Chinese audio track is dropped, you can only watch in English.
  • Ripping or re-encoding a Blu-ray file with 5 audio tracks and director's commentary subtitles: all are preserved in BeeConvert.
  • Converting a professional video with multiple language dubs for distribution: no need to re-import or re-sync — every dubbed track survives the conversion.

Don't lose what matters

Most converters were built for the simple case: one video, one audio. BeeConvert was designed with complex files in mind. Whether you have 2 audio tracks or 10 subtitle languages, every stream is preserved and synchronized after conversion — no data loss, no silent deletion.

Try BeeConvert — keep all your streams