Convert TS to OPUS Online
Convert broadcast TV recordings, DVR captures, and radio streams in MPEG-TS format to modern Opus, free and in your browser.
.ts, .mts · up to 100 MB
Use cases
From broadcast TV and radio to modern Opus
DVB/ATSC and DVR recordings
Convert your digital TV recordings to Opus for archiving or distribution without the broadcast container overhead.
Digital radio to podcast
Transform DAB+ or digital AM/FM radio recordings to Opus ready for podcast distribution.
AVCHD camcorders (MTS/M2TS)
Extract audio from Sony and Panasonic AVCHD camcorder recordings in MTS or M2TS format.
No special software needed
No video editing software required. FFmpeg.wasm processes the TS file directly in your browser.
How it works
Three steps, no hassle
Upload your TS file
Drag or select your .ts, .mts, or .m2ts file. Works with DVB/ATSC recordings, DVR captures, radio digital recordings, and AVCHD camcorder files.
FFmpeg extracts and converts the audio
The AC3, AAC, MP2, or MPEG audio in the TS is decoded and re-encoded to Opus using FFmpeg.wasm. No server uploads.
Download the resulting .opus file
Get Opus audio ready for podcasts, modern platforms, and digital distribution. Smaller file size, modern codec quality.
FAQ
Got questions?
MPEG-TS (Moving Picture Experts Group Transport Stream) is a container format defined in ISO 13818-1 (1994), designed specifically for broadcast transmission (digital terrestrial, satellite, and cable TV). Unlike MP4 (which requires complete file indexes for playback), MPEG-TS is designed to be robust against packet loss in transmission, with fixed-size 188-byte packets that can be processed without knowing the stream's end. DVRs and digital TV recorders save in TS format because that is what arrives from the broadcast signal.
It depends on country and broadcaster. In Europe, DVB-T/DVB-T2 primarily uses MPEG-1 Layer II (MP2) at 192–256 kbps for stereo audio or Dolby Digital (AC-3) for 5.1 multichannel. In the US, ATSC uses Dolby Digital AC-3 as the mandatory standard. In Japan/Brazil, ISDB uses AAC. FFmpeg handles all these codecs correctly when converting to Opus.
Yes. DAB+ (Digital Audio Broadcasting Plus) radio recordings use HE-AAC (High-Efficiency AAC, also known as AAC+) at 48–128 kbps depending on the broadcaster. If you export your DAB+ receiver recording as TS or AAC, this tool can convert it to Opus. HE-AAC uses SBR (Spectral Band Replication) for bandwidth extension; Opus implements similar techniques natively.
Yes. MTS and M2TS are MPEG-TS variants used in the AVCHD (Advanced Video Coding High Definition) standard, introduced by Sony and Panasonic in 2006 for HD camcorders. Audio in MTS/M2TS is typically Dolby Digital (AC-3) at 192–256 kbps or linear PCM. FFmpeg handles them natively and converts the audio to Opus.
By default, the tool converts the first detected audio track. Digital TV TS files can contain multiple audio tracks (alternate languages, audio description, multiple channels). If you need a specific track, the tool processes the default track; for selective stream extraction, additional stream mapping options may be needed.
FFmpeg decodes the AC-3 5.1 to multichannel PCM (6 channels) and can encode to multichannel Opus (Opus supports up to 255 channels per RFC 7845, with practical support up to 8 in most decoders) or downmix to stereo. For 5.1 source material, FFmpeg.wasm defaults to Dolby Pro Logic II stereo downmix before Opus encoding unless channel options are specified.
Convert TS to Opus: extract audio from TV recordings, DVRs, and digital radio
MPEG-TS (Transport Stream) is the broadcast transmission container defined in ISO/IEC 13818-1, part of the MPEG-2 standard published in 1994. Unlike file-oriented containers like MP4 or MKV, MPEG-TS is designed for robust transmission: it uses fixed-size 188-byte packets with Reed-Solomon error correction, allowing stream recovery even with packet loss — making it ideal for satellite, cable, and terrestrial broadcast. The three main digital television systems worldwide use MPEG-TS: DVB (Digital Video Broadcasting, European standard adopted across Asia, Africa, and South America), ATSC (Advanced Television Systems Committee, North American standard), and ISDB (Integrated Services Digital Broadcasting, Japanese standard with adoption in Brazil). All DVB/ATSC recorders, satellite receivers with HDD, and DVRs save in TS format because it is the native broadcast stream without transcoding. This means millions of hours of television and digital radio recordings are stored as .ts files worldwide, with audio in broadcast codecs (MPEG-1 Layer II, AC-3, AAC) requiring conversion for use on modern platforms.
Audio in MPEG-TS varies significantly by broadcast standard: DVB (Europe and much of the world) mandatorily uses MPEG-1 Audio Layer II (MP2) as the minimum codec for stereo audio at 192–384 kbps, and optionally AC-3 (Dolby Digital) for 5.1 channels and HE-AAC for additional streams. ATSC (US and Canada) specifies Dolby Digital AC-3 as the only mandatory audio codec at 192–448 kbps for 5.1. The MTS/M2TS standard of AVCHD (Sony and Panasonic camcorders since 2006) uses AC-3 at 192–256 kbps or 16-bit linear PCM. Opus, standardized in 2012 as RFC 6716, represents a generational improvement over all these codecs: for music audio, Opus at 128 kbps surpasses MP2 at 256 kbps; for voice, Opus at 32 kbps surpasses MP2 at 128 kbps. For DAB+ digital radio using HE-AAC at 48–128 kbps, Opus at the same bitrate offers significantly superior quality according to comparative studies by the EBU (European Broadcasting Union) published in 2016.
Convertir.ai runs the TS→Opus conversion entirely in the browser using FFmpeg.wasm. The process: FFmpeg analyzes the Transport Stream, parses the PMT (Program Map Table) to identify audio PIDs, detects the codec of the main audio track (mp2, ac3, aac, pcm_s16le depending on source), decodes audio to float32 PCM, applies resampling to 48 kHz if needed, and re-encodes with libopus. For files with multiple audio tracks (multiple languages in DVB recordings, audio description), FFmpeg selects the first audio track by default. For AC-3 5.1 audio from ATSC recordings, FFmpeg applies Dolby Pro Logic II stereo downmix before Opus encoding to preserve spatiality in the stereo mix. The result is a .opus file in OGG conforming to RFC 7845. For MTS and M2TS files from AVCHD camcorders (Sony Handycam, Panasonic HC-V, Canon VIXIA), the process is identical as they are MPEG-TS variants. The service is completely free, no file limit, no signup, and no watermark.