MRW to HEVC Converter

MRW to HEVC, or MRW to AV1? Which Should You Pick?

If you are turning an old Minolta RAW into a short clip for a video timeline, you have two efficient modern codecs to choose between and they are not interchangeable. Pick HEVC when the clip has to play back on other people's hardware — phones, TVs, older laptops and editing suites decode H.265 in silicon almost universally. Pick AV1 when the clip is for storage or web delivery and you would rather have the smaller file and no patent-licensing story. For a single still held on screen, both look excellent; the deciding factor is where the file is going, not how it looks.

Everything below assumes the same source: one .mrw frame from a DiMAGE or Maxxum/Dynax body, developed to 8 bits per channel and encoded as a silent clip at 1 frame per second.

HEVC vs AV1 for a Still Frame

When to Pick HEVC

• The clip has to open on someone else's device without you being there to troubleshoot.
• You are dropping it into an editing timeline; H.265 support in editors is more mature and more predictable.
• Encoding time matters, because you are batching a folder of old Minolta files rather than a single frame.
• The destination is a TV, set-top box, or phone from the last decade.

When to Pick AV1 Instead

• You are archiving, and every megabyte across a large batch counts.
• The clip is for web delivery on a modern stack where AV1 decoding is available.
• You want to avoid HEVC's licensing questions entirely.
• Slower encoding is an acceptable trade for the smaller result — see MRW to AV1.

What the .hevc File Actually Is

Renaming the download to .mkv costs nothing — the bytes are already a Matroska file — and it removes the single most common cause of "my player won't open this".

How to Convert MRW to HEVC

1. Upload Your MRW File: Drag .mrw files onto the page or click "+ Add Files". If you queue several, "Merge strategy" decides between one combined clip and one clip per photo.
2. Set Image Duration and Quality: "Image Duration" holds the frame for 5 seconds by default. Leave "Quality Preset" on "Very High (Recommended)", or switch to Constant Quality to set CRF yourself on H.265's 16–51 scale.
3. Choose Video Resolution and Background Color (Optional): "Video resolution" starts on "Keep original"; the presets set height and let width follow the photo's shape. "Background Color" starts on White and fills any bars.
4. Convert and Download: Click Convert and save the clip, then rename it to .mkv if your player is fussy. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

Frequently Asked Questions

Is HEVC better than AV1 for converting a photo to video?

Neither is better in the abstract; they optimise for different risks. AV1 will produce the smaller file from an identical still at matched visual quality, and carries no licensing questions. HEVC will encode faster and play back on far more existing hardware without falling to a software decoder. For a one-frame clip the visual difference is negligible, so choose on compatibility versus file size rather than on quality.

Why does the codec dropdown list both H.265 and HEVC?

Because they are two names for the same standard, and on this page they resolve to the same encoder. HEVC stands for High Efficiency Video Coding, the ISO/IEC name; H.265 is the ITU-T designation for the same specification. Picking either produces identical output. It is redundancy in the interface rather than a meaningful choice.

Will I lose quality going from MRW to HEVC?

You lose the RAW's latitude, not the visible picture. Development converts the 12-bit sensor readout to 8 bits per channel before encoding, so exposure and white balance become permanent. On top of that, H.265 is a lossy codec, though at sensible CRF values a single static frame survives very well — there is no motion for the encoder to smear. Keep the .mrw if you might want to re-develop the shot; treat the clip as a deliverable.

Can the HEVC clip carry the photo's EXIF or camera metadata?

No. MRW keeps a full EXIF block and Minolta's MakerNote inside its TTW section, but that is photo metadata, and a video container has no standard home for it. Shooting data does not travel into the clip. If the capture information matters, export a still alongside the video — MRW to TIFF or MRW to JPG both retain far more of it than any video target can.

Why is my HEVC file silent, and can I add audio?

It is silent because the source is a photograph and there is no audio anywhere in the pipeline to include — the audio codec control does not even appear on image-source pages. Nothing is broken. To add a soundtrack, bring the clip into a video editor and lay audio over it there, or convert to a common container first so more editors will accept it.

Which quality mode should I use for a single frame?

Start with the default Quality Preset — it behaves correctly on H.265, which is a genuine CRF codec, unlike the older codecs offered on our AVI and MPEG pages. Switch to Constant Quality only when you want to name a specific CRF on the 16–51 scale, remembering that lower means better. Use Constraint Quality when a bitrate ceiling has been imposed on you from elsewhere in a project; on this page it adds a Max bitrate limit on top of the CRF value.

Does a longer image duration make the file much bigger?

Barely. At 1 fps with B-frames disabled, every frame after the first is an identical repeat that costs the encoder almost nothing, so most of the file is that first frame. A ten-second hold is not ten times the size of a one-second hold. Choose duration to suit the edit rather than to manage file size.

What if I wanted an image, not a video?

Then HEVC is the wrong target entirely. Convert to a still format instead: MRW to PNG with the Highest preset for a lossless render, MRW to TIFF with LZW compression for an archival copy, or MRW to JPG for something small and universally openable. Video targets exist for timelines and slideshows, not for viewing a photograph.