PEF to FLV Converter

Converting PEF to FLV: What This Tutorial Covers

A PEF is Pentax's proprietary RAW photo — a single, unprocessed still frame straight off the sensor — and FLV is Adobe's old Flash Video container. This page walks you through turning that one RAW still into a short, silent FLV clip, explains exactly what is gained and lost, and is honest about when you should pick a different output entirely. If you just want a viewable photo, convert PEF to JPG; if you want the still as a clip that plays on modern devices, PEF to MP4 is far better than a dead Flash format. Choose FLV only when a specific legacy Flash pipeline or archive still expects the .flv extension.

How to Convert PEF to FLV

1. Upload Your PEF File: Drag and drop your PEF onto the page or click "+ Add Files." You can add several PEF photos at once — RAW files are large, so the upload is the main wait, not the conversion.
2. Set Merge images and Image Duration: Choose Merge images to combine every uploaded PEF into one FLV, or Video per image for a separate clip each. Then set Image Duration (default 5 seconds per frame) to control how long each photo stays on screen.
3. Pick Background Color and Quality Preset: Background Color (default White) fills any letterbox bars when the photo's aspect ratio differs from the video frame. Leave Quality Preset on Very High (Recommended), or set a Video resolution preset to cap the output size.
4. Convert and Download: Click "Convert" and download your FLV. No sign-up, no watermark.

Walk-through: Choosing the Right Video Codec for FLV

By default this tool writes the FLV with the FLV codec — FFmpeg labels it "FLV / Sorenson Spark / Sorenson H.263," the early H.263 variant that classic Flash Player 6 and 7 required. That is the most authentic .flv you can make, but it is also the oldest and weakest of the choices. Open the Video Codec menu under Advanced Options to change it:

• If you want a "real" classic Flash file, leave it on FLV (Sorenson Spark). Best for matching legacy .flv assets, worst for image sharpness.
• If you want the .flv extension but better quality, switch to H.264 — modern players that read FLV (VLC, MPV, ffmpeg) handle it cleanly and your single still stays much crisper.
• If you are archiving a screen-capture-style flat image, Flash Video or Flash Video (v2) are lossless screen codecs (FLASHSV / FLASHSV2); they make large files but keep every pixel.
• MJPEG is also offered — it stores the frame as a JPEG-per-frame, simple but bulky.

Whatever codec you pick, the result is video-only. A PEF carries no audio, so no audio codec is offered and the FLV is silent by design.

PEF and FLV at a Glance

These two formats sit at opposite ends of the media spectrum, which is exactly why the conversion needs care. The source is a high-bit-depth archival still; the target is a low-bit-depth consumer video container that has been retired:

Common Errors and How to Fix Them

• "The FLV won't play / I only see a black screen" — Flash Player reached end of life on December 31, 2020, and browsers block it, so nothing plays .flv natively anymore. Open the file in VLC, which lists FLV among its supported formats, or in ffmpeg, or convert PEF to MP4 instead.
• "The video is just one frozen image" — That is expected. A single PEF is one still, so a single-file conversion is a freeze-frame held for the Image Duration you set. To get a sequence, upload several PEF files and choose Merge images.
• "There's no sound" — Also expected. A still photo has no audio track, so the FLV is silent. Add music or narration afterward in a video editor.
• "The picture looks soft compared to my RAW" — A 12-40 MP Pentax frame is scaled down to a standard-definition-to-1080p video frame and re-encoded with a lossy codec, so most of the original detail is discarded. Set a higher Video resolution preset, or keep the original PEF as your master.
• "My file is DNG, not PEF" — Most Pentax bodies can shoot Adobe DNG instead; use DNG to FLV for the identical workflow.

When This Doesn't Work

For almost everyone, PEF to FLV is the wrong conversion, because it stacks three mismatches: an archival pro-photo RAW becomes a single rendered still, that still becomes a video, and that video targets a container Adobe killed at the end of 2020. If you want to view, print, or share the photo, convert PEF to JPG. If you genuinely need the still as a playable clip, PEF to MP4 produces an H.264 file that plays on phones, browsers, and modern editors with no Flash dependency. Reach for FLV only when a specific legacy Flash workflow — an old web template, an authoring tool, or an archive — insists on the .flv extension. And note the conversion is one-way: demosaicing the RAW bakes in white balance, exposure, and tone, so it cannot recover the editing latitude that is the whole reason to shoot PEF.

Frequently Asked Questions

Should I really convert PEF to FLV, or to JPG or MP4 instead?

For nearly every purpose, no. A PEF is a high-quality RAW still and FLV is a discontinued Flash video container, so this pairing mismatches three ways — still-into-video, archival-RAW-into-consumer-video, and a target format Adobe ended at the close of 2020. To view, print, or share the photo, convert PEF to JPG. If you need the photo as a playable clip, PEF to MP4 outputs H.264 that plays everywhere without Flash. Pick FLV only when a legacy Flash pipeline specifically demands .flv.

Does converting a single PEF to FLV create any motion or sound?

No to both. A PEF is one still photograph with no motion and no audio, so a single-file conversion produces a freeze-frame clip — the rendered image held on screen for the Image Duration you set, with no panning, movement, or soundtrack. To build a sequence, upload several PEF files and choose Merge images; even then there are no transitions, just each photo shown in turn.

Which video codec does the FLV output use?

By default, the FLV codec — what FFmpeg labels "FLV / Sorenson Spark / Sorenson H.263," the early H.263 variant required by classic Flash Player 6 and 7. Under the Video Codec menu you can switch to H.264 for a sharper .flv, to Flash Video or Flash Video (v2) (lossless screen codecs), or to MJPEG. Because the source is a single still, no audio codec is offered and the clip is silent.

Can anything still play an FLV file in 2026?

Not in a browser. Adobe ended Flash Player support on December 31, 2020, and began blocking Flash content on January 12, 2021, so no mainstream browser plays .flv anymore. Desktop players that bundle their own decoders — VLC and MPV — and the ffmpeg toolchain still open FLV files directly. If you need broad, dependable playback, convert PEF to MP4 instead of FLV.

Will I lose image quality going from RAW PEF to FLV?

Yes, substantially, and that is inherent to the conversion. A PEF holds 12-bit or 14-bit unprocessed sensor data that must be demosaiced to become viewable; that render bakes in white balance, exposure, and tone — the editing latitude that is the whole reason to shoot RAW. A 12-40 MP Pentax frame is then scaled to a standard-definition-to-1080p FLV frame, discarding most of the resolution, and the default Sorenson Spark codec is an old lossy format. Keep the original PEF as your master; treat the FLV as a one-off delivery file.

I shoot DNG on my Pentax, not PEF — can I still do this?

Yes. Most Pentax (Ricoh Imaging) bodies let you shoot Adobe's open, royalty-free DNG straight in-camera instead of PEF, so you can choose either at capture. PEF is slightly smaller and Pentax-native; DNG is broadly supported by third-party tools and is the safer long-term archive. This page reads PEF directly; if your files are DNG, use DNG to FLV for the identical workflow.

What does the Background Color setting do to my photo?

It fills the empty space, and it only matters when your photo's shape does not match the video frame's shape. Video frames are fixed rectangles — 16:9 for most presets — while a Pentax still is typically 3:2. Fitting a 3:2 photo into a 16:9 frame leaves bars down the left and right edges, and Background Color (default White) decides what colour those bars are. White or a matching tone blends in when the clip sits on a light background; black is the conventional choice when you want the bars to read as letterboxing rather than as part of the image. The setting never crops or alters the photograph itself — it only paints the leftover area.

What happens to my uploaded PEF file after conversion?

Your file is uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after the conversion — no sign-up, no watermark, never shared or made public. In our testing, a single 24-megapixel PEF held for 5 seconds at the Very High preset produced a short, silent FLV of roughly 1-3 MB, since one repeated frame compresses efficiently.