BMP to MP4 Converter

Turn a BMP Image Into an MP4 Video

This tutorial walks you through converting a Windows bitmap (.bmp) into an MP4 clip that holds your still image on screen for a set length of time. There is no motion — the output is the same picture displayed for the duration you choose — which is exactly what you need when a platform like Instagram, YouTube, or a digital-signage screen accepts a video file but rejects a raw image. By the end you will know how to control the clip length, merge several bitmaps into one slideshow, and stop letterbox bars from appearing.

How to Convert BMP to MP4

1. Upload Your BMP File: Drag and drop or click "+ Add Files" to load one or more .bmp images. Upload several files if you want to chain them into a single slideshow.
2. Set the Image Duration: Choose Duration — how long the still is held on screen. The default is 5 seconds per frame, and the dropdown runs from a single frame (1/60s, 1/30s, or 1/24s) up to 10 seconds per image.
3. Pick Merge Strategy, Resolution, and Background Color: Select Merge images for one combined clip or Video per image for a separate MP4 per file, size the frame with a resolution preset (or Keep original), and set Background Color for any padding bars.
4. Convert and Download: Click "Convert" to get your H.264 MP4. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark.

Walk-through: Duration, Merging, and Padding

Three options do most of the work on this page. Here is how each behaves and when to change it.

• Duration sets how long a single image is displayed. A static frame looks identical at any frame rate, so a longer duration does not inflate quality or file size — it just extends the clip. The single-frame options (1/60s, 1/30s, 1/24s) drop the image in as one true frame, which is handy when you want to place it on an editing timeline and stretch it there.
• Merge strategy decides how multiple uploads are handled. Merge images (the default) plays every still back to back as one continuous clip; Video per image returns a separate MP4 for each file, delivered as a ZIP when there is more than one.
• Background Color only matters when your bitmap's aspect ratio does not match the output frame. Rather than stretch the picture, the converter pads the empty space with a solid color — letterbox bars on the top and bottom for a wide frame, or pillarbox bars on the sides for a tall one. White is the default; Black and other presets are available.

Quick recipes:

• Want a single editable frame for a timeline? Set Duration to 1/30s or 1/60s.
• Want a readable title card? Use 5–10 seconds.
• Want no bars at all? Set the resolution to Keep original so the frame matches your image exactly.
• Want one file from many images? Keep Merge images selected.

Why the MP4 Is Far Smaller Than Your BMP Files

A BMP writes every pixel to disk with no compression (BI_RGB), so a 1920x1080 24-bit bitmap is fixed at about 6 MB — width x height x 3 bytes, plus a 54-byte header — no matter how simple the picture is. H.264 works the opposite way: it stores one keyframe and then only the changes between frames. A held still barely changes from frame to frame, so even a long clip of a single image compresses down to a tiny file.

Exact output size depends on the Quality Preset (Very High by default) and how detailed the image is, but the direction is always the same: bulky uncompressed input, compact video output.

How Long to Hold the Frame

BMP stores a single still, so the only "timeline" in your MP4 is how long that one frame is displayed. The right duration depends on where the clip is going.

Common Errors and How to Fix Them

• "My video is just a frozen picture" — That is expected. A BMP has no frames of its own, so the MP4 holds one still for the Duration you set. For real movement you need a video editor, not a format conversion.
• "There are white bars around my image" — The bitmap's aspect ratio does not match the output frame, so the empty space is padded. Set the resolution to Keep original, or change Background Color to something less obvious.
• "The clip is too short or too long" — Adjust Image Duration. To go beyond 10 seconds per image, make the clip here and extend it afterward in a video editor.
• "My download is a ZIP, not one video" — You used Video per image with multiple files, which produces one MP4 each. Switch to Merge images for a single clip.
• "There is no sound" — Correct, and by design: a bitmap carries no audio, so the output is a silent video. Add a soundtrack later in an editor if you need one.

When This Doesn't Work

This tool turns a still bitmap into a static-frame video; it cannot add motion, transitions, or a Ken Burns pan-and-zoom — those require a video editor. Corrupted files or unusual BMP variants (some 16-bit or older OS/2-style bitmaps) may fail to decode. If what you actually want is a smaller still image rather than a video, convert to PNG or JPG instead. And if you later need to pull a frame back out of a video, use MP4 to BMP for the reverse.

Frequently Asked Questions

Will the MP4 have any motion, or just a static image?

Just a static image. A BMP is a single still raster picture with no frames or timeline of its own, so the conversion holds that one image on screen for the duration you set. There is no panning, zooming, or animation — if you need a moving effect, that requires a video editor rather than a format conversion.

Why is the MP4 so much smaller than my BMP files?

Because BMP is uncompressed and H.264 is not. A 1080p 24-bit bitmap is roughly 6 MB regardless of content, while H.264 stores one keyframe and then only what changes between frames — and a held still barely changes. In our testing, ten 1080p BMP stills (about 59 MB of uncompressed input) merged at 5 seconds each produced a single 50-second H.264 MP4 of just a few megabytes.

How long can the clip be, and what frame rate does it use?

The Duration dropdown ranges from a single frame (1/60s, 1/30s, or 1/24s) up to 10 seconds per image, and the default is 5 seconds. Holding one still for several seconds does not need a high frame rate — a static frame looks identical at any rate — so longer durations keep the file small. To exceed the listed maximum, extend the clip afterward in a video editor.

What codec does the MP4 use, and will it play everywhere?

The MP4 is encoded with H.264 (AVC) by default, the most broadly supported video codec on the web — caniuse reports about 96.9% global browser support, and it plays natively on virtually every phone, smart TV, and social platform. That is why MP4/H.264 is the safe choice when a site demands a video file but you only have a still image.

My BMP isn't 16:9 — why are there white bars, and can I change them?

Because a square or portrait bitmap cannot fill a widescreen frame without distortion, the converter pads the empty space rather than stretching your picture. The fill color comes from the Background Color option (White by default; Black and other presets are available). Alternatively, set the resolution to Keep original so the video frame matches your image's exact dimensions and no padding is added. Note that BMP has no transparency to fill — the bars simply frame the image.

Can I combine several BMP images into one MP4 slideshow?

Yes. Upload multiple .bmp files and choose Merge images; each still is shown for the Duration you set, played back to back as one continuous clip. Choose Video per image instead if you want a separate MP4 for each file, which downloads as a ZIP. For a lightweight looping animation from a sequence of bitmaps rather than a video, BMP to GIF is the better target.

Does the MP4 have any sound?

No. A bitmap contains only pixels — there is no audio to carry over — so the output MP4 is silent by design. If you want music or narration behind the still, add an audio track afterward in a video editor; this converter produces the video layer only.

Should I convert BMP to MP4, or is another format better?

Convert to MP4 only when the destination specifically needs a video file. If you just want a smaller, more portable still image, convert BMP to PNG instead — it is lossless and a fraction of the size of an uncompressed bitmap. Use MP4 when a platform rejects raw images and insists on a playable clip, which is the one scenario where wrapping a still in H.264 genuinely helps.