TS to Y4M Converter
FileFlip converts TS to Y4M entirely inside your browser, using FFmpeg compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a TS file to Y4M?#
- Drop your TS file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to Y4M and the conversion starts on its own. FileFlip downloads 30.8 MB of WebAssembly the first time and nothing after that, then runs FFmpeg on your own machine.
- Save the Y4M file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting TS to Y4M lose quality?#
It depends on what is inside the file. TS is a container rather than a codec, so whether the Y4M conversion copies the streams across untouched or re-encodes them is decided by the codecs that particular file happens to use.
Is it safe to convert TS files online?#
Yes, because nothing is uploaded. FileFlip converts TS files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What TS to Y4M actually does to the file#
Converting TS to Y4M runs on FFmpeg, downloads 30.8 MB of WebAssembly the first time and nothing after that, re-encodes or copies through depending on the codecs in the file, and drops encoded streams.
| Engine | FFmpeg |
|---|---|
| Conversion path | One step: TS → Y4M |
| Downloaded to your browser | 30.8 MB, once, then cached by your browser |
| Quality | Decided by the codecs inside the file |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Encoded streams | Dropped | The target format has nowhere to put it. |
What is a TS file?#
A TS file carries MPEG transport stream data, the packetized container built for broadcast so a receiver can start decoding correctly at any point after tuning into a channel already in progress.
Keep a recording as TS while it's still being processed by broadcast or streaming tools that expect the transport stream structure, such as a DVR or an HLS pipeline.
Convert TS to MP4 once a recording is done being processed and just needs to play back or get edited, since MP4 drops the broadcast-oriented overhead without losing any video quality.
What is a Y4M file?#
A Y4M file holds YUV4MPEG2 data, raw uncompressed video frames in planar YCbCr with a short plain-text header, the format codec developers feed into encoders like x264, x265 and vpxenc so nothing but the codec under test touches the pixels.
Use Y4M when testing or comparing video encoders, where the point is to remove every other codec from the pipeline so the one under test is the only variable.
Convert Y4M to a compressed format like MP4 for anything other than encoder testing, since the raw size makes it impractical to store or share.
TS to Y4M questions people ask#
What produces a TS file?
TS files come from DVB or ATSC TV tuners and DVRs recording a broadcast, from screen or capture card recordings saved by streaming software, and from downloaded HLS video that got reassembled into one file. Anything captured from a live broadcast feed tends to land in this container.
Why won't my TS file play in some apps?
TS is built for tuners and set-top boxes, not general media players, so some software either doesn't recognize it or can't find the program information it needs before starting playback. VLC and other FFmpeg-based players handle it without issue; if a player still fails, the video or audio codec inside the stream is the more likely culprit.
What is a TS file good for converting to?
Convert TS to MP4 for normal playback and editing. The transport stream's packet structure exists to survive a broadcast link, which a saved file doesn't need, so remuxing or re-encoding to MP4 gives the same video in a container every device already understands.
Is a TS file the same as an MPG file?
No. Both can hold MPEG-2 video, but TS is the transport stream, split into small self-contained packets for a broadcast link, while MPG is the program stream, built for a single continuous read off a disc or hard drive. They're sibling formats from the same MPEG systems standard rather than the same file structure.