Step 1: Provide your 3GP files using the button above or by toss and let go.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Fetch your converted BMP files.
3GP to BMP Conversion FAQ
How do I extract individual frames from 3GP as BMP images?
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Upload the 3GP file and the converter exposes a frame-extraction picker: every Nth frame, frames at specific timestamps, or one frame per second. Each chosen frame is decoded from the 3GP video stream, encoded as a separate BMP file, and bundled as a ZIP for download. 3GP is the container the 3GPP standardised for early mobile phones, when video had to fit a 176x144 screen and a 2G data plan. BMP is the Windows Bitmap, the raw raster format built into Windows since 1985.
Can I get the BMP frames without the subtitles?
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Only if the 3GP never had them burned in, because 3GP has no selectable subtitle stream to switch off. Anything a 3GP 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. 3GP is capped at low resolutions and mono speech-grade audio; upscaling it will not restore detail that was never captured.
How big will the BMP files be?
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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 do the extracted BMP images come out?
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Same resolution as the source 3GP: a 1080p 3GP produces 1920x1080 BMP frames, a 4K 3GP produces 3840x2160 BMP frames. The converter does not upscale or downsample — pixel dimensions are pulled straight from the decoded frame. Use /resize-image/ after extraction if you need smaller thumbnails.
Can I extract every frame of a 3GP as BMP?
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Yes, but mind the file count — a 30 fps 1-minute 3GP produces 1,800 BMP frames. We pack them into a single ZIP archive automatically. For longer clips, prefer the "1 per second" preset (60 frames per minute) or pick specific timestamps. An hour of 3GP at every-frame would produce ~100,000 BMP images.
Will the BMP frames preserve the 3GP colour grading?
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Yes — colour is decoded with the same matrix the source 3GP stream advertises (BT.709 for HD, BT.2020 for 4K HDR). HDR sources are tone-mapped to SDR when extracting to a BMP that cannot store HDR pixel ranges natively (JPG, PNG-8). Target high-bit PNG-16 or TIFF if you need to keep extended dynamic range.
How big is one extracted BMP frame on disk?
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Depends on resolution and BMP codec choice: a 1080p PNG frame is 2-5 MB lossless, a 1080p JPG at quality 85 is 200-500 KB. Multiply by frame count to size the ZIP — at the extreme, every-frame PNG extraction of a 10-minute 1080p 3GP is roughly 50 GB and gets split across multiple ZIPs.
Does the extracted BMP keep camera EXIF metadata?
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A 3GP container does not carry per-frame EXIF the way a still camera does, so the BMP files come out with empty EXIF blocks. The converter does embed a `creation_time` field pointing at the source frame timestamp, so you can re-sort the bundle in chronological order or correlate with subtitle / chapter markers.
How long does frame extraction from 3GP to BMP take?
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Frame decoding is fast — typically 20-30% of source duration. A 5-minute 3GP -> BMP bundle finishes in about 1 minute regardless of how many frames you pick, because the bottleneck is the BMP encoder writing many small files in parallel, not the 3GP demuxer.
Can I extract frames at exact timestamps inside the 3GP video?
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Yes — the advanced timestamp option accepts a comma-separated list (e.g. `00:01:23, 00:05:00, 00:10:42.5`) and produces one BMP file per timestamp. Useful for chapter thumbnails, scene reference shots, or building a contact sheet for review.
Is my 3GP private during frame extraction?
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Yes — same privacy model as every conversion. Source 3GP and the extracted BMP bundle are processed in isolated workers and deleted within minutes of completion.
Why are my extracted BMP frames blurry?
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Almost always motion blur baked into the source 3GP (the camera or subject was moving while that frame was captured). Try picking timestamps from static scenes, or extract several adjacent frames and pick the sharpest. The pipeline does not synthesize detail that is not in the original 3GP.
