Step 1: Transfer your WMV files using the button above or by slide and deposit.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Retrieve your converted BMP files.
WMV to BMP Conversion FAQ
How do I extract frames from a WMV video as BMP images?
+
Upload the WMV and the converter exposes a frame-extraction picker: every Nth frame, frames at specific timestamps, or one frame per second. Each chosen frame is encoded as an individual BMP file and the full set is bundled into a ZIP archive for download. WMV is Windows Media Video, Microsoft’s ASF-based format from the Windows XP era. BMP is the Windows Bitmap, the raw raster format built into Windows since 1985.
Why do my extracted frames have horizontal lines through them?
+
Because the source is interlaced. WMV content from the broadcast and DVD era stores two half-height fields per frame, captured a fiftieth of a second apart, and a still pulled straight out shows both woven together as combing on anything that moved. Enable deinterlacing before extraction and each still is built from a single reconstructed progressive frame.
Can I get the BMP frames without the subtitles?
+
Only if the WMV never had them burned in, because WMV has no selectable subtitle stream to switch off. Anything a WMV shows on screen is in the picture itself, so it is in every BMP the extraction produces and no setting removes it afterwards. Where a separate subtitle file exists alongside the video, extract from a source that kept the two apart and the frames come out clean. WMV is effectively a dead end: macOS, iOS, Android and every browser need third-party decoders, and some WMV files carry DRM that cannot be converted at all.
How big will the BMP files be?
+
Larger than you might expect, because BMP keeps every pixel exactly rather than approximating. A 1080p still lands around 2-5 MB and a 4K still around 6-15 MB, so a long extraction run adds up quickly. That is the right trade when the images feed further processing, and the wrong one when they are going straight onto a web page. BMP usually stores completely uncompressed pixel rows with a small header, which is why it is so simple to parse.
At what resolution does each extracted BMP frame come out?
+
The same resolution as the WMV video — a 1080p WMV produces 1920×1080 BMP frames; a 4K WMV produces 3840×2160 BMP frames. Use the resize utility after extraction if you want smaller thumbnails or social-media-sized crops.
Can I extract every single frame from WMV as BMP?
+
Yes, but be careful with file count — a 30fps 1-minute WMV produces 1,800 BMP frames. We pack them into a ZIP automatically. For longer clips, the "1 per second" option (60 frames) or specific timestamps gives a manageable result.
Will the extracted BMP images preserve the WMV color grading?
+
Yes — colour is decoded with the matrix the source WMV uses (BT.709 for HD, BT.2020 for 4K HDR). HDR sources are tone-mapped to SDR on extraction to BMP because most BMP formats (PNG, JPG) cannot store HDR pixel ranges natively.
What is the file size of one extracted BMP frame?
+
Depends on resolution and BMP codec. A 1080p PNG frame is typically 2 to 5 MB; a 1080p JPG at quality-85 is 200 to 500 KB; a 4K PNG is 6 to 15 MB. At the extreme, every-frame PNG extraction of a 10-minute 1080p WMV produces ~50 GB total.
Does the extracted BMP retain EXIF camera metadata?
+
The WMV container does not store per-frame EXIF the way a still camera does, so the BMP files come out with empty EXIF. We embed a `creation_time` field pointing at the source frame timestamp so you can re-sort the bundle by capture order.
How long does frame extraction from WMV to BMP take?
+
Frame extraction is fast — typically 20 to 30% of source duration on the standard pipeline. A 5-minute WMV → BMP bundle finishes in about a minute regardless of frame count, because the bottleneck is the BMP encoder, not the WMV demuxer.
Can I extract frames at specific timestamps in the WMV?
+
Yes — the advanced option accepts a comma-separated list of timestamps (e.g. `00:01:23,00:05:00,00:10:42`) and produces one BMP file per timestamp. Useful for chapter thumbnails, scene reference shots, or thumbnailing long lectures.
Is my WMV video private during frame extraction?
+
Yes — same privacy model as every conversion. Source video and extracted BMP frames are processed in isolated workers and deleted within minutes; no human review, no training corpus, no third-party access.
