RW2 to WebM Converter

Convert RW2 to WebM: What This Tutorial Covers

This is for anyone holding a Panasonic LUMIX .rw2 raw photo who needs it as a WebM video clip — a title card, a photo slate, a freeze frame to drop onto a web-video timeline, or a batch of stills strung together into a slideshow. By the end you will have a silent WebM that holds your photo on screen for a duration you choose. Two things to know before you start: the raw is rendered first, so the editing latitude is gone, and a single photo produces a motionless clip, not an animation. If you only want a picture to look at or share, convert RW2 to JPG instead and keep the RW2 as your master.

How to Convert RW2 to WebM

1. Upload Your RW2 File: Drag and drop your .rw2 file onto the page or click "+ Add Files" to browse. You can queue several photos at once.
2. Choose a Merge Strategy: "Merge images" is preselected, which joins every uploaded photo into one WebM played back to back. Switch to "Video per image" if you want each RW2 to come out as its own separate clip.
3. Set Image Duration, Codec and Background: "Image Duration" opens on 5 seconds per frame and runs from a single frame (1/60s, 1/30s, 1/24s) up to 10 seconds. "Video Codec" opens on VP9, with VP8 and AV1 also available. "Background Color" opens on White and fills any letterbox bars.
4. Convert and Download: Click "Convert" and download your WebM. Files upload over an encrypted connection, are processed on our servers, and are deleted automatically after a few hours. No sign-up, no watermark.

Walk-through: Duration, Resolution and Codec

Three things shape the output, and only one of them is obvious from the panel.

• Duration decides what the clip is for. Pick a sub-second entry — 1/24s for cinema, 1/30s or 1/60s for web and broadcast — when you want a single freeze frame that drops onto a timeline without fighting your sequence's timing. Pick 2 to 10 seconds when you want a slate or title card that lingers; the preselected 5 seconds reads comfortably for most.
• "Keep original" resolution is not the raw's native size. Before encoding, every still is re-rendered to a clean PNG clamped to 4096 pixels on its long edge, because that is the largest frame the image demuxer handles reliably. The 4912 x 3688 DC-FZ45 raw used to check this page therefore came out as a 4094 x 3074 video, not 4912 x 3688. If you want a specific frame size, set it explicitly under "Video resolution" — and note that the Preset Resolutions list is height-only, with width following the photo's aspect ratio.
• Stay on VP9 unless you have a reason not to. The "Quality Preset" control genuinely drives the encode on VP9 and AV1, which are the constant-quality codecs here; on VP8 the quality slider under "Constant Quality" renders a 0-63 range that the encoder never receives, so it looks functional and does nothing. VP9 is also what the container opens on and what current browsers decode fastest.

Bitrate and file-size modes are deliberately hidden on image-to-video pages, so the controls you have are "Quality Preset" (preselected, opening on "Very High (Recommended)"), "Constant Quality" and "Constraint Quality". There is no audio control at all — see below.

What a Single RW2 Actually Produces

Measured on the same 20.9 MB Panasonic DC-FZ45 raw, at every default this page opens with.

VP9, VP8 or AV1?

Common Errors and How to Fix Them

• "My WebM has no sound." Expected, and not fixable here. A photo carries no audio, and the audio codec control is hidden on image-to-video conversions, so the output is silent by design.
• "There is a white bar around my photo." Your photo's shape does not match the output frame. Rather than stretch or crop it, the converter pads the gap with the "Background Color" you chose, and that opens on White. Pick Black or another colour, or set an explicit Width x Height that matches your photo's aspect ratio.
• "The clip does not move." One photo is one still frame. To get anything on screen to change you need several photos with "Merge images" selected, or a real video source.
• "My video is smaller than my photo." The 4096-pixel clamp described above. A 24-megapixel LUMIX frame will always come back as a roughly 4K-wide video, never at full sensor resolution.
• "The colours look flat compared to my edit." The converter applies a neutral default development of the raw; it does not read adjustments made in Lightroom, Capture One or Panasonic's own software. Export a TIFF or JPEG from your editor and convert that if you need a specific look baked in.
• "It will not play on an older device." Some older players do not decode VP9. Re-run with "Video Codec" set to VP8, or use RW2 to MP4 for the widest device and editor support.

When This Doesn't Work

This conversion cannot create motion from a single photo, cannot recover raw latitude once it is rendered, and cannot read your editor's adjustments. If the RW2 will not open at all, it may come from a camera body newer than the raw decoder recognises, or the file may be truncated — export a JPEG or TIFF from the manufacturer's software and convert that instead. And if what you actually want is a picture rather than a video, RW2 to JPG is the right tool; come to WebM only when you specifically need a video clip.

Frequently Asked Questions

Does rendering an RW2 to WebM lose my raw editing latitude?

Yes, completely. While the file stays raw, white balance, exposure and highlight recovery are all still adjustable, because the sensor mosaic has not been interpreted yet. Converting to WebM demosaics that data and bakes a default interpretation into finished 8-bit video pixels, after which you can no longer rebalance colour or pull back blown highlights. Keep the original RW2 as your master and treat the WebM as a disposable export.

Does the WebM clip have any motion or sound?

Neither. A single photo is displayed as a static image for the duration you set — no panning, no zooming, no animation — and the output carries no audio stream, because the audio codec control is hidden on image-to-video conversions. If you have several photos and want them to play in sequence, leave the merge strategy on "Merge images"; each one will then hold for its set duration, one after another, in a single file.

Which WebM codec does the output use?

VP9, unless you change it. WebM is a Matroska-derived container that carries VP8, VP9 or AV1 video, and all three are offered under "Video Codec" on this page. VP9 is preselected and is the practical choice: it compresses well and is decoded natively by current versions of Chrome, Firefox, Edge and Safari. AV1 goes smaller still at the cost of much slower encoding.

Why is my video 4094 pixels wide when the raw is 4912?

Because every still is re-rendered to a clean PNG clamped to 4096 pixels on the long edge before it reaches the encoder — the frame size the image demuxer handles reliably. A 4912 x 3688 raw scales to 4094 x 3074, and that is what "Keep original" means on this page. It is not a quality preset or a mistake, and there is no way to raise the ceiling from the options panel.

What file size should I expect?

Larger than people expect, because the frame is enormous. At every default — VP9, "Very High" preset, 5 seconds, White background, Keep original — the 20.9 MB DC-FZ45 raw produced a 4,559,565-byte WebM. Almost all of that is the single keyframe; running the same photo for 10 seconds instead of 5 adds very little, because every frame after the first is identical and costs the encoder next to nothing.

Is RW2 really a TIFF-based format?

Structurally, yes. RW2 is Panasonic's proprietary raw container, but it opens with a standard image file directory and uses ordinary TIFF tags alongside Panasonic's own raw-compression tags, and it embeds a JPEG preview. That is why generic tools can often show the preview of an RW2 they cannot actually develop. None of that structure survives here — the sensor payload is rendered into VP9 video, and the raw advantage exists only in the original file.

Why does the "Constant Quality" slider do nothing on VP8?

Because on VP8 the encoder receives neither a constant-quality value nor a bitrate, so it silently falls back to its own internal default and your slider position is discarded. The control renders because the same panel is shared across codecs. On this page it is a reason to stay on VP9 or AV1, where the quality settings really do change the output; if you need VP8 specifically, use "Quality Preset" and accept that fine-grained control is not available.

Should I convert RW2 straight to WebM, or render a photo first?

If you just want a usable still to view, edit or share, render it to a photo with RW2 to JPG. Go to WebM only when you specifically need a video clip — a slate, a title card, or a still for a web-video timeline. For a file that plays on more devices and drops into more editors, RW2 to MP4 is the safer target. Whichever you choose, your file is uploaded over an encrypted connection, rendered on our servers, and deleted automatically after a few hours.