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Rewrap media containers with stream copy.
Details
Fast container conversion using -c copy. It fails clearly when the selected container cannot hold the existing codecs.
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Ready for a run
Tool usage guide
Stream Smart Remux allows you to quickly change the container format of your media files without re-encoding. By using direct stream copy, it preserves the original video and audio quality while converting between MP4, MKV, MOV, and WebM formats instantly.
Background
A video editor has a screen recording saved as an MKV file, but their editing software only accepts MP4 files.
Problem
They need to change the container to MP4 quickly without losing quality or wasting time on re-encoding.
How to use
Upload the MKV file, select 'MP4' as the output container, and run the tool.
Outcome
The file is instantly converted to MP4 with identical video and audio quality, ready for import into the editor.
Background
An archivist has web-optimized WebM clips that need to be stored in a more versatile container format.
Problem
They want to package the streams into an MKV container without altering the original codecs.
How to use
Upload the WebM file, select 'MKV' as the output container, and process the file.
Outcome
An MKV file is generated containing the original streams without any quality degradation.
No, it uses stream copying to change the container without altering the original video or audio tracks.
The conversion fails if the target container does not support the codecs inside your source file. Try selecting MKV as it supports almost all codecs.
You can upload media files up to 100MB.
Yes, the tool supports both audio and video files as inputs.
No, because the streams are copied directly without decompression or compression, the quality remains identical.