CAVS to WTV Converter

Transform CAVS video into WTV format online for free

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Seamless Format Shift

Move from CAVS to WTV in a few clicks — the converter handles codec translation, container remuxing, and audio synchronization automatically.

Batch Processing

Upload and convert multiple files in one session. The converter handles each file individually and delivers all results together.

Simple Workflow

Upload, pick a format, and convert — three steps to your result. The interface is clean and intuitive for everyone.

How to convert CAVS to WTV

1

Select or drag&drop CAVS video to convert it to the WTV format from your computer, iPhone or Android. Moreover, it is possible to choose it from your Google Drive or Dropbox account.

2

Now your video is uploaded and you can start the CAVS to WTV conversion. If it is needed, change the output format to one of the 37 video formats supported. After that, you can add more videos for batch conversion.

3

If you want, you can customize such settings as resolution, quality, aspect ratio and others by clicking the gear icon. Apply them to all the video files if necessary and click the button "Convert" to process.

4

Once your video is converted and edited, you can download it to your Mac, PC or another device. If necessary, save the file to your Dropbox or Google Drive account.

About formats

CAVS (Chinese Audio Video Standard) is a video compression standard developed by the Audio Video Coding Standard Workgroup of China and adopted as a national standard (GB/T 20090.2) in February 2006. The project began in 2002 with the aim of creating an independent compression technology that could serve the massive broadcasting and multimedia infrastructure in China without relying on foreign-licensed codecs. CAVS, also referred to as AVS1, achieves compression efficiency comparable to H.264/AVC while utilizing a simpler patent framework with significantly lower licensing costs. The standard supports video resolutions from standard definition up to high definition, making it suitable for both terrestrial digital television broadcasting and broadband streaming. Key technical features include 8x8 block transforms, multiple prediction modes, and a loop filter designed to reduce blocking artifacts at low bit rates. The Chinese government endorsed CAVS as the mandatory compression standard for the national digital TV broadcasting system, ensuring broad deployment across set-top boxes and television receivers in the country. While CAVS has limited international adoption compared to H.264 or HEVC, its significance lies in serving one of the largest media markets in the world and demonstrating a viable national alternative to globally dominant video coding standards.
Initial release: February 2006
WTV (Windows Recorded TV Show) is a digital video recording format developed by Microsoft and introduced in July 2008 with the Windows Media Center TV Pack for Windows Vista. The format was designed to replace the earlier DVR-MS recording format used by Windows Media Center, offering a more capable container for recording live television broadcasts. WTV files store video in MPEG-2 or H.264 encoding alongside multiple audio tracks in AC-3 or MPEG audio format, along with closed caption data, electronic program guide metadata, and copy protection flags. The container uses an internal directory structure that supports time-shifting features, allowing Windows Media Center to record content while simultaneously enabling playback from the beginning of the recording. A rich metadata framework preserves detailed program information from the electronic program guide (EPG), including show title, episode description, genre, ratings, and original air date, making it easy to organize and browse recorded content. The format supports both standard definition and high definition recordings from digital cable, over-the-air ATSC, and ClearQAM tuner sources. WTV files are natively accessible through Windows Media Center and can be converted to the simpler DVR-MS format using built-in Windows tools. While Windows Media Center was discontinued after Windows 7 (with limited support in Windows 8), WTV files remain in personal media archives and can be processed by third-party video tools.
Developer: Microsoft
Initial release: July 16, 2008

Frequently Asked Questions

What is the benefit of converting CAVS to WTV?

CAVS files are designed for the Chinese broadcast ecosystem. Switching to WTV opens up compatibility with international hardware and software.

How can I play WTV files?

Windows Media Center and Windows Media Player with codec packs can play WTV recordings.

Can I convert multiple CAVS files at once?

Yes. Upload several CAVS videos in a single batch and convert them all to WTV simultaneously — no need to process them one by one.

How long does the conversion take?

Processing time depends on file size and chosen settings. Most conversions finish within seconds to a few minutes on our cloud servers.

Is software installation required?

No installation needed. The CAVS to WTV converter works entirely in your browser on any operating system or device.

Can I use this on a mobile device?

Absolutely. The converter works in any modern mobile browser — iPhone, Android, tablet — with the same features as on desktop.