BMP to Video Converter

How to Convert BMP to Video Online

1. Upload Your BMP Files: Drag and drop or click "Add Files" to select BMP (Windows Bitmap) images from your computer. Batch is supported — drop in a single bitmap for a one-frame video, a handful for a slideshow, or hundreds of sequential frames captured from a microscope, simulation render, or legacy industrial camera. The Merge Type control lets you combine all files into one video or emit a separate video per BMP.
2. Pick a Video Codec and Quality Preset: Default is H.264 at the Very High preset — the universal choice that plays in every browser, on every phone, and on every smart TV. Switch to H.265 / HEVC for ~50% smaller files at the same quality, VP9 or AV1 for modern open-web playback, MPEG-4 / Xvid / DivX for legacy device compatibility, or MJPEG / HuffYUV for visually lossless archival. Quality presets range Lowest → Highest, or set a custom CRF (0-51 for H.264, 0-63 for VP9/AV1, lower = higher quality; 18-23 is visually lossless), target a fixed file size in MB, or lock a specific bitrate in kbps / Mbps.
3. Set Image Duration, Resolution, and Background Color (Optional): Choose how long each BMP displays — from 1/60 second (cinema-style 60 fps timelapse) up to 10 seconds per slide for a calm photo show. Pick a resolution preset (240P, 360P, 480P, 720P, 1080P, 1440P, 2160P / 4K, all the way to 8K / 4320P) or social-ready aspect ratios (1080×1920 vertical for Reels / TikTok / Shorts, 1080×1080 square for Instagram, 1920×1080 landscape for YouTube). Set a background color (black, white, or any of 24 named colors) for letterboxing when bitmaps don't match the output aspect, and use Image Drop Frames or Video Trim to subset a long capture sequence.
4. Convert and Download: Click Convert. Files process in your browser session and download as a single video — choose the output container (MP4, MOV, WebM, AVI, MKV, MPEG, FLV, WMV, M4V, OGV, MTS, MPG, and more). No sign-up, no watermark, no cap on the number of input bitmaps.

Why Convert BMP to Video?

BMP (Windows Bitmap) is the uncompressed raster format Microsoft introduced in 1985 — every pixel stored verbatim, no DCT, no palette tricks unless you ask for them. That fidelity is exactly why scientific instruments, legacy Windows apps, and old screen-capture tools still emit BMP sequences today, and exactly why those sequences are awkward to share: a single 4K BMP runs 30+ MB, and a 500-frame microscope capture quickly hits 15 GB. Wrapping that sequence in an H.264 or H.265 video bundles it into a single playable file that any platform — social, signage, LMS, slack — will accept. Common reasons to do this:

• Scientific imaging and microscopy — Confocal microscopes, electron microscopes, and high-speed industrial cameras frequently emit numbered BMP sequences (frame_00001.bmp through frame_05000.bmp) because BMP preserves every pixel without lossy artifacts that would distort measurements. Wrapping 500 frames at 1/30 second produces a smooth 16-second 30 fps video for paper supplements, lab presentations, and conference talks.
• Legacy Windows apps and industrial software — Older CAD tools, simulation software, machine-vision systems, and Windows screen-capture utilities still default to BMP output. A 30-image BMP slideshow at 4 seconds each becomes a 2-minute MP4 that runs from any USB stick, Teams meeting, or smart TV without the recipient needing a BMP viewer.
• Digitized scanner output and document archives — Flatbed scanners and overhead document scanners often save TIFF or BMP page-by-page. Convert a 50-page scanned manual to a flippable MP4 at 5 seconds per page for video-only training portals or LMS systems that won't accept image carousels.
• Stop-motion animation from BMP frames — Animators rendering from older 3D pipelines (3ds Max, Lightwave, early Blender exports) sometimes target BMP for its lossless single-pass output. Set 1/12 or 1/24 second per frame to assemble cinematic stop-motion or hand-drawn animations directly to MP4.
• Screen recordings and game-capture sequences — Programs like FRAPS and older capture tools wrote BMP sequences for highest fidelity. Convert to H.265 MP4 to shrink a 12 GB BMP capture to a ~200 MB shareable video without re-recording.
• Compressing a bitmap archive into one shareable file — Sending 200 BMPs by email is impossible (each is huge, and most clients won't preview them). One 1080p H.265 MP4 of the same 200 images at 3 seconds each is a single attachment, often under 50 MB, and the recipient just presses play.

If your source is a JPEG sequence instead, see JPG to MP4; if you need to extract bitmaps back out of a finished video, see video to BMP.

BMP vs MP4 — Format Comparison

Image Duration and Frame Rate Quick Guide

Frequently Asked Questions

Why is my BMP sequence so much larger than the resulting MP4?

BMP stores every pixel uncompressed — a 1920×1080 RGB bitmap is exactly 1920 × 1080 × 3 bytes ≈ 6.2 MB before any header overhead, regardless of image content. H.264 and H.265 use temporal compression (only the differences between frames are stored) plus DCT-based spatial compression, which is why a 500-frame BMP capture (3+ GB) routinely shrinks to a 30-50 MB MP4. The visual quality drop is negligible at CRF 18-23, and for sequences with similar adjacent frames (microscope captures, screen recordings) the savings are often 100×.

Should I pick H.264 or H.265 for the codec?

H.264 is the safe default — every browser, phone, smart TV, and social platform plays it natively without plugins. Pick H.265 (HEVC) when you want roughly half the file size for the same visual quality and your audience is on iPhone (since iOS 11 / 2017), modern Android, recent Windows 10/11, or macOS Big Sur or later. For broadest compatibility (older Android, embedded players, Discord previews) stick with H.264; for archival of scientific captures where every pixel matters use MJPEG or HuffYUV (visually lossless intra-frame).

How long will my video be if I upload N BMPs?

Output duration = number of images × image duration. 60 BMPs at 4 seconds each = 240 seconds (4 minutes). 1,800 microscope frames at 1/30 second = 60 seconds. The setting is per-image and applied uniformly to every BMP in the upload list, so plan the duration around your total frame count.

Does the order of images in the video follow the upload order?

Yes — BMPs appear in the video in the order they're listed on the upload screen (typically alphabetical by filename). Numbered sequences like frame_00001.bmp through frame_00500.bmp sort correctly without manual reordering. Drag rows to reorder before clicking Convert if you need a different sequence.

What happens if my BMPs are different resolutions or aspect ratios?

Each frame is scaled to fit the chosen output resolution while preserving its source aspect ratio. Empty space is filled with the background color (letterbox for tall sources in a wide frame, pillarbox for wide sources in a tall frame). For consistent results without padding, resize BMP all images to the same dimensions first, or pick the Original resolution preset to keep each bitmap's native size.

Can I add background music to the slideshow?

This converter produces silent MP4 by default — BMP images carry no audio, so there's no source track to encode. To add music, convert here first, then merge it with a video editor (DaVinci Resolve, Shotcut, CapCut, Adobe Premiere) downstream. The Audio Codec setting (AAC, MP3, AC-3, Opus, FLAC, Vorbis) is exposed so the output container is ready to accept a track when you splice one in.

Can I trim the sequence or skip every Nth frame?

Yes. Video Trim sets a start time and duration on the output, useful when the first few microscope frames are out of focus or the last few are wasted. Image Drop Frames takes every 2nd, 3rd, 4th… up to every 10th frame from a long sequence, which is the fastest way to shrink a 5,000-frame capture to a manageable 1,000-frame video without re-running the experiment.

Should I emit one merged video or one video per BMP?

The Merge Type control covers both. Pick "merge into one video" for slideshows, timelapses, and frame-sequence playback — the default for most workflows. Pick "one video per image" when you need each BMP wrapped as its own MP4 (useful for digital signage playlists, social-media batch uploads, or training portals that schedule files individually).

What's the max file size and image count?

There's no hard cap on the number of BMPs, but everything runs in your browser session, so very large jobs (thousands of 4K bitmaps at 30+ MB each) depend on your device's RAM. For reference: 500 × 4K BMPs at 1 second each produces a ~5-minute 4K MP4 in the 200-500 MB range depending on codec and CRF. If you hit memory pressure, convert in chunks of 200-300 frames and concatenate with merge video.