Decoder to Demux

A specialized tool for developers and broadcast engineers to demultiplex muxed media streams into individual audio, video, and subtitle tracks.

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1,428+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Decoder to Demux processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

Decoder to Demux is a headless tool for developers and broadcast engineers to extract individual streams from muxed containers. It supports common containers like MPEG-TS, MP4, and MKV and outputs per-stream data as raw elementary streams or re-packaged blocks. It helps with debugging, testing encoding pipelines, and validating stream integrity.
Conceptually, it parses the container to build a stream index, maps each stream to its type and codec, and streams the payload to separate files. Timestamp handling aligns PTS/DTS and ensures synchronized playback when outputs are analyzed or reassembled in a workflow.
Core value lies in deterministic, scriptable demux that tolerates partial damage and produces per-stream manifests. Advanced usage includes selective demux, dry-run capability, timebase normalization, and disciplined naming conventions that integrate with existing pipelines.
Typical use cases include quality assurance during transcoding, preparing audio/video/subtitle tracks for encoding or analysis, validating stream presence and order in broadcast materials, and debugging container parsing issues across automated workflows.

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How to Use

Provide inputs: specify input_file and container_type.
Select streams to demux by index or type.
Choose output_dir and output_mode (raw elementary streams or re-packaged blocks).
Run demux operation.
Retrieve demuxed streams and per-stream manifest.

Frequently Asked Questions

Find Quick Answers

What formats are supported?

Currently supports MPEG-TS, MP4, and MKV containers. The tool parses each format's internal tracks to output separate streams; encrypted inputs require keys and cannot be demuxed without them. Additional formats can be added by implementing new container parsers.

Can I demux only specific streams?

Yes. You can specify streams by index or by type (video, audio, subtitle). The tool then exports only the chosen streams to discrete files and generates a per-stream manifest for traceability.

Will timestamps be preserved?

The demux operation preserves PTS/DTS values and aligns them to a common timebase. When outputs are used in later steps, this ensures correct synchronization across streams; timebase normalization can be applied on demand.

Are outputs encrypted or protected?

No encryption is applied during demux; outputs are raw or re-packaged streams. If inputs are encrypted, demux may fail unless decryption keys are provided externally. The tool does not implement DRM handling.

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