What is the TS file format?
.ts (short for Transport Stream) is a video container format used for transporting and storing compressed MPEG audio and video data. Originally developed for digital broadcast television (DVB, ATSC, ISDB), it is also widely used by DVR devices and set-top box recorders.
.ts files use the MPEG-2 Systems container standard and store data in a multiplexed format. The stream consists of fixed-size 188-byte packets, each starting with the sync byte 0x47. Multiple elementary streams - video, audio, and metadata - are carried simultaneously and identified by Packet Identifiers (PIDs), allowing the format to support simultaneous image and sound transmission.
Recorders typically create multiple .ts files for a single session, e.g. name1.ts, name2.ts, name3.ts, etc. These can be converted into other formats such as .MP4, .MPG, .MKV, and .M2TS.
Security & safety
RISK: LOWA TS video is media data - it doesn't execute on its own when you play it in a media player, so risk is low. Two practical cautions: (1) malformed or maliciously crafted streams have occasionally triggered bugs in media decoders, so keep your player (VLC/MPV) updated; (2) only the right kind of player should be used - opening a TS in a text editor just shows binary garbage. Files downloaded from untrusted sources should be scanned like any download.
Format details
in a nutshellFULL NAMEMPEG Transport Stream
DEVELOPERMPEG / ISO-IEC (MPEG-2 Systems)since 1995 (ISO/IEC 13818-1, MPEG-2 Systems)
CATEGORYVideo Files
MIME TYPEvideo/mp2t
TYPEBinary MPEG-2 Transport Stream container (fixed 188-byte packets)
STANDARDOpen · royalty-free
This extension is also used by…
- TypeScript source code - Microsoft's typed superset of JavaScript uses .ts for plain-text source files (.tsx with JSX); open these in a code editor like VS Code, not a video player.
- Qt translation source (Linguist) - Qt's Linguist tool stores translatable strings in .ts XML files - niche, developer-only.
MAGIC BYTES · FILE SIGNATURE
OFFSET
00
HEX
47
ASCII
G
An MPEG Transport Stream is a series of 188-byte packets, each starting with the sync byte 0x47, so byte 0 (and bytes 188, 376, 564 …) is 0x47. This repeating sync is the reliable identifier of a TS video file.
Programs that open TS files
Windows4 apps
VLC media player
Open-source Open the .ts directly - VLC plays transport streams natively, including odd timestamps. 
FFmpeg
Open-source Remux/convert: 'ffmpeg -i in.ts -c copy out.mp4' (fast, lossless when codecs are MP4-compatible). 
HandBrake
Open-source Convert a TS video to MP4/MKV (re-encode or passthrough); good for trimming TV recordings. 
mpv
Open-source Plays TS video reliably, including streams with timing quirks that confuse other players. 
macOS2 apps
Linux3 apps
FFmpeg
Open-source Remux/convert TS: 'ffmpeg -i in.ts -c copy out.mp4' (fast, lossless when codecs are MP4-compatible). Technical details
deep spec| Container structure | Fixed-size 188-byte packets mandated by ISO/IEC 13818-1; no variable-length packets |
| Sync byte | 0x47 at offset 0 of every packet; repeats exactly every 188 bytes and is the primary file identifier |
| MIME type | video/mp2t |
| Packet Identifier (PID) | 13-bit field (0x0000-0x1FFF) in each packet header routing the payload to the correct elementary stream |
| Program Association Table (PAT) | Mandatory table carried at PID 0x0000; lists all programs in the stream and their corresponding PMT PIDs |
| Program Map Table (PMT) | Per-program table mapping component PIDs for video, audio, subtitles, and other elementary data streams |
| Program Clock Reference (PCR) | 42-bit timestamp embedded in adaptation fields; used by decoders to recover the encoder clock and synchronize audio/video |
| Multi-program support | A single .ts file can carry one program (SPTS) or multiple programs simultaneously (MPTS) |
| Codec support | Container-agnostic: carries MPEG-2 Video, H.264/AVC, H.265/HEVC, MPEG-1 Audio, AC-3, AAC, and other codecs as PES payloads |
| Conditional access | Supports stream encryption via Conditional Access System (CAS) using ECM and EMM packets |
| Error resilience | Packet-based structure lets receivers resynchronize from the next 0x47 sync byte after a transmission error without restarting |
| Adaptation field | Optional 0-183 byte field per packet carrying PCR timestamps, discontinuity flags, and stuffing bytes for padding |
| Primary use cases | Digital broadcast TV (DVB-T/S/C, ATSC, ISDB), IPTV delivery, live stream recording, and DVR output |
| Common conversion targets | .mp4 (H.264/AAC remux), .mkv (lossless container switch), .mpg (MPEG-2 compatibility), .m2ts (Blu-ray variant) |
| Released | 1995 (ISO/IEC 13818-1, MPEG-2 Systems) |
| Open standard | Yes · royalty-free |
| Specification | en.wikipedia.org |
TS conversions
Possible
.TS .MP4GUIDE
Yes, TS converts to MP4 - and when the recording already holds H.264/AAC (most TV and camcorder files do),…
How to convert
.TS .MKVGUIDE
Yes -- FFmpeg remuxes TS to MKV losslessly in seconds, keeping all video, audio, and subtitle tracks.
How to convert
.TS .MP3GUIDE
Yes - ffmpeg extracts audio from a TS file to MP3 in a single command and is the fastest method.
How to convert
.TS .AVIGUIDE
Yes - ffmpeg or HandBrake can convert TS to AVI on Windows, macOS and Linux, though MP4 or MKV are better…
How to convert
.TS .MOVGUIDE
Yes - ffmpeg converts TS to MOV in one command, and HandBrake handles it with a GUI.
How to convert
Community Q&A
asked by usersNo questions yet - be the first to ask about TS files.
Frequently asked questions
How do I open a .ts video file?
Play it in VLC or MPV - both support MPEG Transport Streams natively on Windows, macOS and Linux. The default Windows player often fails on TS (no audio/codec issues), so use VLC.
How do I convert a .ts video to MP4?
Use ffmpeg for a fast lossless remux ('ffmpeg -i in.ts -c copy out.mp4') when the codecs are already MP4-compatible, or HandBrake if you need to trim or re-encode. VLC can also Convert/Save to MP4.
How do I join many .ts files into one video?
They're usually HLS stream segments. With ffmpeg, list them and concatenate losslessly: 'ffmpeg -f concat -safe 0 -i list.txt -c copy output.mp4'. TS files merge cleanly at packet boundaries.
My .ts video has no sound - how do I fix it?
Usually a codec/track issue (e.g. AC-3 audio your player can't decode, or the wrong track selected). VLC/MPV handle most codecs; or remux to MKV/MP4 with ffmpeg, selecting the correct audio track ('-map').
What's the difference between .ts and .m2ts?
Both are MPEG transport streams. .m2ts (BDAV) is the Blu-ray/AVCHD variant with extra per-packet timing info; plain .ts is the broadcast/streaming form. VLC plays both, and ffmpeg converts either to MP4.
Why is my .ts file not a video - it looks like code?
Then it isn't a transport stream. The .ts extension is also used by TypeScript source code; if the file is readable text with import/const/function, open it in a code editor like VS Code, not a media player.
References
1ISO/IEC 13818-1 - MPEG-2 Systems (Transport Stream)www.iso.org
2Wikipedia - MPEG transport streamen.wikipedia.org
