Step 1: Supply your MPG files using the button above or by haul and lay.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Get your converted FLV files.
MPG to FLV Conversion FAQ
What does the MPG to FLV converter do?
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It transcodes a MPG video into the FLV container. Resolution, frame rate, and aspect ratio are preserved by default — useful when you need a different format for a target player without quality loss.
Will resolution and frame rate be preserved in the FLV?
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Yes. MPG → FLV keeps resolution, frame rate, and aspect ratio unchanged by default. To change them, use the Resize or Speed tool on the result.
Will the MPG play smoothly on modern devices after converting to FLV?
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Yes. Legacy MPG files often fail to play in modern browsers and on iOS / Android. FLV uses widely supported codecs that play natively on phones, tablets, smart TVs, and every modern browser.
Will the converted FLV be a different size than the MPG?
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Modern codecs compress better, so FLV from a legacy MPG is typically 30-60% smaller at equivalent quality. Conversions in the opposite direction can grow the file.
My MPG footage shows comb lines on movement — will that carry into the FLV?
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It will unless you deinterlace, and MPG content very often is interlaced because the format comes from the broadcast and DVD era. Interlaced frames store two half-height fields captured a fiftieth of a second apart; on a progressive-scan phone or monitor that reads as horizontal combing on anything that moves. Turn on the deinterlace option and the encoder weaves the fields into whole progressive frames before writing the FLV. MPG is the same MPEG program stream as .mpeg — the three-letter extension is a DOS-era truncation, not a different format.
My MPG has several audio tracks — do they all survive into the FLV?
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Not dependably. MPG stores multiple audio streams as first-class tracks, but FLV playback support past the first track is inconsistent, so most players will only ever expose one. Choose the track you actually want before converting; the others are better extracted to their own files than left in a container that hides them. MPG is the extension DVD authoring software, older camcorders and broadcast ingest tools recognise, so it stays useful for those pipelines. No current browser, phone or TV can play FLV — anything still in this container has to be moved out of it to remain watchable.
What should I watch for converting an MPG from a disc or a broadcast recording?
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Interlacing and aspect ratio, in that order. Material made for television is interlaced almost without exception, so deinterlacing has to be on or every moving edge arrives combed; and a great deal of it is stored as non-square pixels with a flag saying how wide to display it, which a converter that ignores the flag turns into a stretched or squashed FLV. Check the first few seconds of the output before running a batch — both faults are obvious immediately and invisible in the settings.
Will the FLV still play smoothly on a phone or a TV?
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It may not. MPG is decoded by dedicated silicon on phones, tablets and TVs, which is why it plays without flattening the battery. FLV typically falls back to software decoding on the same hardware — higher CPU load, a warmer device, and dropped frames on 4K material. For a device target, MPG is the safer container to stay in.
What happens to 5.1 surround audio when converting MPG to FLV?
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It is downmixed to stereo, because FLV has no dependable multichannel path. The fold-down uses the standard ITU coefficients so dialogue in the centre channel stays intelligible and the surrounds come in at reduced level rather than vanishing. Anything that relied on discrete channel placement is gone after that.
Is there any point converting between two legacy formats like MPG and FLV?
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Only if a specific piece of equipment demands the target. Both formats come from the same pre-H.264 era, so neither conversion buys efficiency, quality or future-proofing — it buys compatibility with one particular device. If the goal is to keep the footage usable long-term, convert to a current container instead of sideways. MPG inherits every MPEG-2 limitation — heavy bitrate, interlacing, no soft subtitles — plus the confusion of two extensions for one format.
Is there a file-size limit when converting MPG to FLV?
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Anonymous uploads are capped at a generous default; signed-in free accounts get a higher cap, and Pro accounts have no per-file limit. Browser memory is usually the practical constraint long before our server-side limits kick in.
Can I batch-convert several MPG files to FLV at once?
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Yes. Drop or pick multiple MPG files in one upload — the converter processes them in parallel and returns a ZIP of the FLV results. There is no need to repeat the upload step per file.
