ASF to MPG Converter

Convert ASF to MPG Online

ASF is Microsoft's Windows Media container — the .asf/.wmv/.wma family that typically wraps WMV video and WMA audio. Outside the Windows ecosystem those files are awkward to play, edit, or burn. This converter re-encodes them into an MPG (MPEG program stream) that plays on practically any media player, hardware DVD/disc player, and editing tool, with MPEG-2 video and MP2 audio by default.

How to Convert ASF to MPG

1. Upload Your ASF File: Drag and drop or click "Add Files" to add .asf clips — Windows Media exports, old screen recordings, or streamed-content captures. Batch is supported; drop in a whole folder and each file converts in parallel.
2. Pick Quality Preset or Bitrate Mode: The default is the "Very High (Recommended)" Quality Preset, which targets near-DVD MPEG-2 output. Switch to Specific file size to cap the result at a fixed MB target, Constant Bitrate for predictable sizing in DVD-authoring tools, Variable Bitrate for smaller files at the same perceived quality, or Constant Quality / Constraint Quality for finer encoder control.
3. Resize or Trim if Needed (Optional): Under Video resolution keep original, choose a Preset Resolution (DVD-friendly 720×480 NTSC / 720×576 PAL, or 1080p / 720p / 480p / 360p), scale by Resolution Percentage, or enter a custom Width × Height. Use Trim with a Time Range — start time plus duration in seconds or HH:MM:SS.sss — to cut intros or unwanted segments before encoding.
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

ASF vs MPG at a Glance

The default output is an MPEG-2 program stream — the right pick for almost every use. Choose MPEG-1 only when you specifically need VCD-era compatibility. If you want a smaller modern file instead, ASF to MP4 produces H.264 at a fraction of the size; to shrink an existing MPG afterward use Compress MPG.

Frequently Asked Questions

Does ASF to MPG lose quality?

Yes — it is a lossy-to-lossy re-encode. ASF holds WMV/VC-1 video and WMA audio, while MPG here holds MPEG-2 video and MP2 audio; these are different codecs, so the video is fully decoded and re-encoded with no lossless remux path between them. You cannot recover detail the original WMV encode already discarded. To keep the loss as low as possible, leave the Quality Preset on "Very High (Recommended)" or switch to Constant Quality and pick a high setting, and avoid converting back and forth repeatedly — each round trip degrades the picture further.

Why is my MPG file larger than the original ASF?

MPEG-2 is a 1995-era codec, while WMV 9 / VC-1 (2006) compresses roughly 2–3× more efficiently at the same visual quality. Re-encoding Windows Media into MPEG-2 usually grows the file because the older codec needs more bits to match perceived quality. This is expected — the trade-off is universal hardware-player compatibility. If size matters more than legacy playback, convert to ASF to MP4 instead for a much smaller H.264 file, or drop the resolution / pick a lower bitrate target here.

Will my MPG play on a DVD player?

The MPG file is the source, not a finished disc. For a hardware DVD-Video player, the stream must be MPEG-2 at 720×480 (NTSC) or 720×576 (PAL), at or below 9.8 Mbit/s video bitrate, with AC-3 or MP2 audio — then authored into a VIDEO_TS structure and burned. XConvert produces a compliant MPEG-2 .mpg; run it through a free authoring tool like DVDStyler or Bombono DVD to add menus and burn. For a newer disc-free player, copying the .mpg to a USB stick usually plays directly with no authoring step.

Does the audio convert too?

Yes. The WMA audio inside the .asf is decoded and re-encoded into an MPEG-compatible track — MP2 (MPEG-1 Audio Layer II) by default, which every MPG-aware player and DVD-authoring tool accepts. Video and audio stay in sync. Multichannel WMA Pro audio is downmixed to stereo for a standard .mpg; if you are authoring a DVD and need AC-3 5.1, target the DVD-specific audio path so the surround channels are preserved.

What's the difference between .mpg, .mpeg, and .mpeg2?

.mpg and .mpeg are interchangeable extensions for the same MPEG program stream that multiplexes video plus audio. XConvert outputs a multiplexed .mpg by default with MPEG-2 video. If you want the variant named explicitly, ASF to MPEG and ASF to MPEG-2 are separate endpoints that produce the same family of program stream under those extensions. In our testing, a short standard-definition ASF clip converted at the default Very High preset produced an MPEG-2 .mpg a little larger than the source — normal for the older codec.

What's the practical file size limit?

There's no fixed file-count cap, and conversion runs on our servers rather than your machine, so the real constraint is upload size and connection speed — a large .asf simply takes longer to upload before encoding starts. You can queue multiple files in one batch and download them individually or as a single ZIP. Files are removed from our servers automatically after a few hours.

How do I go the other way, from MPG back to ASF?

To convert an MPG (or MPEG-2 stream) back into a Windows Media container — useful for legacy Windows servers or older PowerPoint embedding — use MPG to WMV. For a modern, widely compatible container instead of legacy MPG, MPG to MP4 re-encodes to H.264 in an MP4 wrapper that plays on phones, browsers, and current editors.