NUT vs TS
A detailed comparison of NUT Container and MPEG Transport Stream — file size, quality, compatibility, and which format to choose for your workflow.
NUT Container
Video FilesNUT is an open multimedia container format designed by MPlayer and FFmpeg developers as a simpler, more robust alternative to existing containers. It supports any codec and offers good error resilience with low overhead.
About NUT filesMPEG Transport Stream
Video FilesTS (Transport Stream) is used for broadcasting, streaming, and recording live TV.
About TS filesStrengths Comparison
NUT Strengths
- Technically efficient.
- Low overhead.
- FFmpeg-native support.
TS Strengths
- Designed for noisy channels — packet-level error correction.
- Multi-program: one TS can carry several TV channels.
- Native format for all digital TV broadcasts and HLS streaming.
- Streaming-first: no need to download whole file to start playing.
- 30+ years of stable, deployed infrastructure.
Limitations
NUT Limitations
- Tiny ecosystem.
- Overshadowed by MKV.
- Rarely used in production.
TS Limitations
- Packet overhead (~3% vs Program Stream).
- Seek index is implicit — requires scanning for random access.
- Multiple audio/subtitle selection requires parsing PMT (Program Map Tables).
- fMP4 is gradually replacing TS for modern low-latency streaming.
Technical Specifications
| Specification | NUT | TS |
|---|---|---|
| MIME type | video/x-nut | video/mp2t |
| Extension | .nut | — |
| Design | FFmpeg/MPlayer collaborative spec | — |
| Encoding | Variable-length integers | — |
| Extensions | — | .ts, .m2ts, .mts |
| Standard | — | ISO/IEC 13818-1 (MPEG-2 Systems) |
| Packet size | — | 188 bytes (standard); 192 bytes (M2TS/Blu-ray) |
| Primary use | — | Broadcast TV + HLS streaming |
Typical File Sizes
NUT
- 10-min H.264 clip 80-200 MB
TS
- HLS video segment (6 seconds, 1080p) 2-5 MB
- 1 hour recorded TV (HD) 4-8 GB
- Satellite transponder capture (1 min) ~300 MB
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Convert between NUT and TS online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
NUT (NUT Container) is a video container format that bundles one or more video streams, audio tracks, and optional subtitles into a single file. The container format determines how metadata is organised and which codecs can live inside; the visual quality itself depends on the codec (H.264, H.265, VP9, AV1) rather than the NUT wrapper. It is part of the video files family.
NUT (NUT container) is a video container formato that bundles one ou more video streams, audio tracks, e optional subtitles em a single file. The container formato determines how metadata is organised e which codecs can live inside; the visual quality itself depende de the codec (H.264, H.265, VP9, AV1) em vez de the NUT wrapper. It is part of the video arquivos family.
VLC, MPV and PotPlayer play nearly every NUT file on desktop. Browser support varies: modern Chromium, Firefox and Safari play common containers via the HTML5 <video> tag, but niche NUT variants may fail. If a device refuses your NUT, convert to MP4 with our NUT to MP4 converter for universal playback.
VLC, MPV e PotPlayer reproduzir nearly every NUT arquivo on desktop. Browser support varies: moderno Chromium, Firefox e Safari reproduzir common containers via the HTML5 <video> tag, mas niche NUT variants may fail. If a device refuses your NUT, converter to MP4 com our NUT to MP4 converter para universal playback.
Upload your NUT to KaijuConverter and pick MP4, MOV, MKV, WebM, or any other target. Our pipeline uses FFmpeg under the hood and stream-copies when codecs are compatible (no quality loss) or transcodes at high-quality defaults otherwise. Conversion runs server-side; both files delete within two hours.
Only when the target requires re-encoding. If the codecs inside NUT match what the target container supports, FFmpeg stream-copies the streams and the output is bit-identical to the source. Transcoding uses transparent quality defaults (CRF 20–23 H.264) and produces output indistinguishable from the original at normal viewing distance.