WebM to TS Converter

How to Convert WebM to TS Online

1. Upload Your WebM File: Drag and drop your .webm file onto the page or click "+ Add Files" to browse. Batch upload is supported — queue several clips and they convert one after another.
2. Pick a Codec, Quality Preset, or Bitrate: TS doesn't carry VP8, VP9, AV1, Opus, or Vorbis, so the converter re-encodes into a TS-compatible stack. Default is H.264 video with AAC audio (the only combo iOS HLS players accept natively). Use Quality Preset for one-click presets (Very High through Lowest), Constant Bitrate when you need a predictable file size, Variable Bitrate for bandwidth-aware encoding, or Constant Quality (CRF for H.264/H.265) when you care about visual fidelity over file size. Specific file size lets you target an exact MB cap.
3. Resize or Trim (Optional): Under Video resolution keep original, set Resolution Percentage, pick a Preset Resolution (4320p down to 144p), or set Width x Height directly. Under Trim switch to Time Range to cut a specific in/out point — useful for slicing a long screen recording into HLS-ready chunks.
4. Convert and Download: Click "Convert". Files are processed and downloaded as .ts containers ready to drop into an m3u8 playlist, FFmpeg pipeline, or DVB workflow. No watermark, no sign-up, no upload of your file to a third-party server.

Why Convert WebM to TS?

WebM is a web-native container built around VP8/VP9/AV1 video and Opus/Vorbis audio, designed by Google for HTML5 <video> playback. MPEG-2 Transport Stream (.ts), defined in ISO/IEC 13818-1, is the opposite — a packetized container built for broadcast and streaming chains where packet loss, multiplexing, and live ingest matter more than bandwidth efficiency. Going from WebM to TS almost always means re-encoding to H.264/H.265 video and AAC/AC-3 audio, because no shipping TS muxer carries VP9 or Opus in the wild.

• HLS segment packaging — HTTP Live Streaming has used MPEG-TS as its original segment container since Apple introduced it in 2009; even after fMP4/CMAF support was added in HLS (Apple WWDC 2016), .ts remains the most broadly compatible segment format for older iOS, Roku, and Smart TV clients.
• DVB and ATSC broadcast — terrestrial (DVB-T/T2, ATSC), satellite (DVB-S/S2), and cable (DVB-C) all transmit MPEG-TS as the physical-layer payload. WebM cannot enter any of those distribution paths without being remuxed.
• IPTV and managed networks — telco IPTV head-ends, hotel TV systems, and corporate digital signage ingest TS over UDP/RTP multicast. The fixed 188-byte packet structure aligns with hardware decoders that don't understand MP4 boxes.
• Live contribution feeds — SRT, Zixi, and RTP transports wrap MPEG-TS, so any live encoder fed from a recorded WebM (e.g., a Twitch clip replayed into a broadcast playout) needs the TS wrapper first.
• Hardware playback — set-top boxes, Blu-ray authoring tools, and older PVRs read TS natively but choke on WebM. Converting first makes the file playable on devices that haven't been firmware-updated since 2015.
• FFmpeg concat and editing — concat: protocol joining works cleanly on TS because every packet is self-contained; trying the same with WebM requires re-muxing the entire file because of the Matroska cluster structure.

WebM vs TS — Format Comparison

Codec & Quality Quick Guide

Frequently Asked Questions

Will my VP9 or AV1 video survive the conversion losslessly?

No. TS does not carry VP9 or AV1 in any commonly deployed muxer, so the converter has to decode the WebM and re-encode the video into H.264 or H.265. That's a generational lossy step. Pick Constant Quality with CRF 18 (H.264) or CRF 20 (H.265) for visually-transparent output, or Variable Bitrate at 5–8 Mbps for 1080p if you need a target size.

What happens to the Opus or Vorbis audio?

Same story — TS doesn't carry Opus or Vorbis in any shipping decoder chain. The audio is re-encoded to AAC by default (or AC-3 / MP2 if you pick an MPEG-2-style profile). AAC at 128–192 kbps stereo is the safe default for HLS.

Can I just rename .webm to .ts?

No, and trying it will give players a file they can't open. WebM uses Matroska's EBML container with VP8/VP9 video, while TS uses 188-byte MPEG-2 transport packets with PIDs, PMTs, and PATs. The byte structure is completely different — a real conversion has to remux and re-encode.

Is the TS output ready to drop into an HLS playlist?

Almost — the TS file is a valid HLS segment, but a full HLS feed needs a master .m3u8 playlist with #EXT-X-TARGETDURATION and #EXTINF tags pointing to each segment. For a single-file VOD you can use FFmpeg's -f hls -hls_time 6 against this .ts to chunk and generate the playlist. For live, feed the file through a packager like Shaka or Bento4.

Why does HLS still use TS when fMP4 exists?

CMAF / fMP4 segments (added to HLS at WWDC 2016) are smaller and let you share one encode between HLS and DASH, but TS segments still play on a wider range of older iOS, Roku, Smart TV, and set-top box clients. If your audience includes pre-iOS 10 devices or older smart TVs, ship TS. If you're targeting only modern devices, fMP4 is the better choice.

What's the difference between .ts for video and .ts for TypeScript?

Just a collision in file extensions. A video .ts (MIME video/mp2t) is an MPEG-2 Transport Stream; a TypeScript .ts is a plain-text source file. They share no bytes in common. If your file opens in VLC it's the video kind; if it opens in VS Code with import statements it's TypeScript.

Will the resulting TS play in Chrome or Firefox directly?

No — neither Chrome, Firefox, Edge, nor desktop Safari ships a native video/mp2t decoder. You either need to play it via hls.js (which demuxes the TS in JavaScript and feeds MSE), wrap it in an HLS manifest, or convert it to MP4 with TS to MP4 for direct <video> playback.

Does the converter support batch conversion of multiple WebM files?

Yes — drop several .webm files onto the page and they all queue with the same settings. Each TS output downloads separately. Useful when you have a folder of recorded WebM clips you need to ingest into an HLS pipeline at once.

What if I want a smaller WebM rather than a TS conversion?

If the goal is just to shrink the file for web playback, use Compress WebM instead — it stays in VP9 and avoids the lossy re-encode to H.264. Convert to TS only when the destination genuinely needs the MPEG-TS container (HLS, DVB, IPTV, hardware decoder). For other distribution targets see WebM to MP4 or WebM to MOV.