CONVERT
MP4 → TS
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Fast, secure MP4 to TS conversion. No registration required.
Opening note — MP4 is the MPEG-4 Part 14 container, the web's default video format with H.264/H.265 support. The TS you want is two clicks away. Converting MP4 to TS changes how the video is packaged without re-recording it. Most MP4 to TS jobs are about getting the file to open on a platform that refuses the original container — an upload form, a social app, an older media player. KaijuConverter uses FFmpeg to either stream-copy (no re-encoding, zero quality loss) or transcode when codecs differ, and keeps the original MP4 intact. Keep in mind MP4 is the MPEG-4 Part 14 container, the web's default video format with H.264/H.265 support. And remember that TS is the MPEG transport stream, used in broadcast and HLS streaming segments.
MP4 Video
Source formatMP4 is the most universally supported video container format. It typically uses H.264 or H.265 video codecs with AAC audio, providing an excellent balance of quality and file size across all devices and platforms.
MPEG Transport Stream
Target formatTS (Transport Stream) is used for broadcasting, streaming, and recording live TV.
Why convert MP4 to TS
MPEG Transport Stream is better supported than MP4 Video across web uploads, social networks and consumer devices. Converting trades the niche advantages of MP4 for broad playback and fewer "file type not supported" messages. Stream copy (when codecs match) keeps the video bit-identical to the source.
HOW TO CONVERT
MP4 → TS
Upload the MP4
Drop your MP4 onto the uploader. Files up to 25 MB run on the free tier without registration; paid plans go up to 2 GB.
Stream-copy or re-encode
FFmpeg probes the codecs; if compatible, it stream-copies (no quality loss). Otherwise it transcodes at matching bitrate.
Download the TS
Fetch the converted TS as soon as it is ready. Both files auto-delete within two hours.
Common Use Cases
Share across platforms
Send TS files to anyone without worrying about whether they have the right software for MP4.
Embed in documents
Drop TS output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
TS often produces smaller files than MP4 for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
MP4 vs TS — Strengths and limitations
What each format does best, and where it falls short.
MP4 Strengths
- Universal playback — every browser, phone, TV, game console, and editing suite reads MP4.
- Supports modern codecs (H.264, H.265, AV1) with no container changes.
- Progressive streaming works with the "moov atom" at the start of the file.
- Carries subtitles, chapters, multiple audio tracks, and embedded metadata.
- ISO-standardized (ISO/IEC 14496-14) and patent-licensable via MPEG LA.
Limitations
- Codec licensing (H.264, H.265) carries royalty costs for commercial use.
- Streaming requires the moov atom at the start — a misplaced atom breaks web playback.
- Not ideal for lossless or professional editing workflows (use ProRes or DNxHD instead).
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
- 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).
MP4 vs TS — Technical specifications
Side-by-side comparison of the technical details.
MP4
- MIME type
- video/mp4
- Container
- ISO Base Media File Format (ISO/IEC 14496-12)
- Common video codecs
- H.264 (AVC), H.265 (HEVC), AV1, VP9
- Common audio codecs
- AAC, MP3, FLAC, Opus
- Max file size
- Practically ~16 TB; 2^63 bytes theoretical
- Streaming
- Supported with faststart (moov atom at front)
TS
- MIME type
- video/mp2t
- 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
| Specification | MP4 | TS |
|---|---|---|
| MIME type | video/mp4 | video/mp2t |
| Container | ISO Base Media File Format (ISO/IEC 14496-12) | — |
| Common video codecs | H.264 (AVC), H.265 (HEVC), AV1, VP9 | — |
| Common audio codecs | AAC, MP3, FLAC, Opus | — |
| Max file size | Practically ~16 TB; 2^63 bytes theoretical | — |
| Streaming | Supported with faststart (moov atom at front) | — |
| 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 |
MP4 vs TS — Typical file sizes
Approximate file sizes for common scenarios.
MP4
- Smartphone video (1080p, 1 min) 60–120 MB
- 4K video (1 min, H.265) 200–400 MB
- Streamed movie (90 min, H.264) 1–4 GB
- Social clip (15s, H.264, 720p) 3–8 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
Quality & Compatibility
Stream-copy is bit-perfect: when the codecs inside MP4 match what TS can carry, the frames are copied across without re-encoding and the output is visually identical to the source. When transcoding is required, we target CRF 20–23 H.264 — visually transparent for most content — and keep audio bitrate at 192 kbps AAC.
Tips for Best Results
- Stream-copy beats re-encoding by orders of magnitude — check if your MP4 already uses TS-compatible codecs before picking Advanced settings.
- For social uploads, 1080p at 30 fps strikes the best quality-to-size ratio; 4K is often downscaled server-side anyway.
- Keep the MP4 if you plan further editing — transcoded TS is fine for final delivery but not for intermediate edits.
Frequently Asked Questions
Only when it has to. If the codecs inside MP4 (usually H.264 or H.265 for video, AAC for audio) are accepted by TS, we stream-copy — the bytes are repackaged into the new container with zero re-encoding and no quality loss. When the source uses a codec the target does not support, we transcode at a matching bitrate to keep the visual quality close to the original.
With stream copy, expect the job to finish in seconds to tens of seconds regardless of video length — the work is mostly rewriting the container. Transcoding is slower (roughly real-time: a ten-minute clip takes about ten minutes) because every frame must be decoded and re-encoded. The progress bar shows which mode applies.
Yes. Resolution, frame rate, colour space and bit depth are preserved by default; stream copy is literally bit-identical on these parameters. If you explicitly pick a lower bitrate or a different codec in Advanced, the output is rebuilt to those settings, but the default is always "match the source".
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