What quality should I expect from the FLV output?

Our converter preserves as much fidelity as Flash Video allows. Where MPEG Video carries information that Flash Video cannot represent, that information is mapped to the closest equivalent (for example, color spaces, codec parameters, or metadata fields). For most everyday uses the result is indistinguishable from the source.

Does the MPEG to FLV conversion change my video resolution or frame rate?

No. By default we preserve the original resolution, aspect ratio, and frame rate from your MPEG source. Only the container and, where required, the codec changes. If your source uses a codec that Flash Video cannot store, the video stream is re-encoded to a compatible codec while keeping the visual properties identical.

What file size should I expect for the FLV output?

The output size depends on the content and the compression characteristics of Flash Video. In most cases the FLV file will be in the same ballpark as your MPEG input, with differences driven by how each format encodes data. There is no fixed ratio — the converter does not change quality settings unless you ask it to.

When should I convert MPEG to FLV instead of staying with MPEG?

Convert when the application, device, or workflow you are targeting prefers Flash Video over MPEG Video. If your current MPEG file already opens and behaves correctly everywhere you need it to, there is no benefit to converting — keep the original. The most common reasons to switch are compatibility (a tool only accepts FLV), distribution (recipients expect FLV), or feature requirements specific to Flash Video.

What is the maximum MPEG file size I can convert?

MegaConvert accepts MPEG files up to 100 MB on the free service, which is enough for the vast majority of real-world MPEG Video files. If you have a larger file (typical for high-resolution video or uncompressed audio), please contact us — we can sometimes accommodate larger uploads for legitimate use cases.

Is my MPEG file safe and private when I upload it?

Yes. Your MPEG file is uploaded over HTTPS, processed in an isolated job environment, and deleted from our servers within one hour. We do not read, index, store, or share the contents of your file. No account is required, so the upload is not associated with a personal identity. See our privacy policy for the full details.

Convert MPEG to FLV

Free online MPEG to FLV converter. No signup required.

Drag & drop your file here

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Max file size: 100 MB

Why Convert MPEG to FLV?

Understand when and why this conversion makes sense for your workflow.

Converting MPEG Video to Flash Video is often necessary to ensure playback compatibility across media players, operating systems, and streaming services. Video formats encode footage using different codecs, container structures, and compression techniques, each with distinct trade-offs between file size, quality, and support. From sharing videos online to preparing files for professional editing workflows, the right format makes a significant difference in how your content is experienced.

MPEG Video has a known limitation: much lower compression efficiency than H.264, H.265, or AV1. In contrast, Flash Video offers a key advantage: compact file sizes with acceptable streaming quality. While MPEG Video is commonly used for dvd-video authoring and playback, Flash Video is better suited for legacy web video archives and content migration.

With MegaConvert, you can convert MPEG to FLV online without installing software, preserving your video content accurately within the target format's specifications.

MPEG vs FLV: Format Comparison

Side-by-side comparison of the source and target formats.

Property	MPEG (Source)	FLV (Target)
Extension	.mpeg	.flv
Full Name	MPEG Video	Flash Video
Compression	Varies	Lossy
File Size	Large	Varies
Best For	DVD-Video authoring and playback	Legacy web video archives and content migration
Browser Support	Varies	Limited

How to Convert MPEG to FLV

Follow these simple steps to convert your file in seconds.

Upload your MPEG video
Choose your .mpeg file using the file picker or drag it into the upload area. Video uploads can take a few seconds for short clips and longer for high-resolution footage; the progress bar shows upload status separately from conversion. Files up to 100 MB are supported.
Start the FLV conversion
Click convert. Where the video codec is compatible with Flash Video, the stream is repackaged without re-encoding to preserve original quality. Where re-encoding is required, we use industry-standard codec presets that balance file size against quality. Audio tracks are converted in parallel.
Wait for the video conversion to complete
Video conversions take longer than other file types because video data is much larger. A short clip might finish in 10 seconds; a 100 MB file may take a minute or two depending on whether re-encoding is required. The progress bar shows the percentage complete.
Download your .flv file
When the conversion finishes, click the download link to save the new Flash Video file to your computer. The file is yours — no watermarks, no expiration on the file itself, and no MegaConvert account is required to download it.

Tips for Converting MPEG to FLV

Practical advice to get the best results from this conversion.

Why this conversion is worth doing

MPEG Video has a known limitation: much lower compression efficiency than H.264, H.265, or AV1. Flash Video addresses this with a key advantage: compact file sizes with acceptable streaming quality. Converting from MPEG to FLV is most worthwhile when this specific trade-off matters for the way you intend to use the file.

Match the format to the actual workflow

MPEG Video is most commonly used for dvd-video authoring and playback, while Flash Video is the standard for legacy web video archives and content migration. If your workflow is closer to the second pattern, converting makes sense. If you are still working in a context where MPEG is the norm, converting may create unnecessary compatibility friction with collaborators or tools that expect the source format.

Watch for this limitation in the FLV output

Flash Video has its own limitation worth understanding before you commit: obsolete format since Adobe Flash Player reached end-of-life in 2020. After the conversion completes, open the FLV file and verify that this limitation does not affect your specific use case — for some workflows it is irrelevant; for others it can be a deal-breaker.

Avoid transcoding unless necessary

Every time you transcode (re-encode) a video, some quality is lost unless you use a lossless codec. If you only need to change the container format without changing the codec, use a remux (stream copy) operation instead of a full re-encode. This preserves original quality and is much faster.

Understanding MPEG and FLV Formats

Learn about the source and target file formats to understand what happens during conversion.

Source Format

MPEG Video

video/mpeg

MPEG files use the full-length extension for MPEG-1 or MPEG-2 video content, functionally identical to .mpg files. The MPEG video standard was groundbreaking when introduced, establishing the foundation for all modern video compression. MPEG-2 in particular remains in active use for broadcasting and DVD content despite being superseded by newer codecs for streaming.

Advantages

Universal hardware and software decoder support
Reliable, mature format with decades of proven use
Standard format for DVD and broadcast television content

Limitations

Much lower compression efficiency than H.264, H.265, or AV1
Large file sizes compared to modern codecs at similar quality
Limited container features compared to MP4 or MKV

Common Uses

DVD-Video authoring and playback
Digital broadcast television encoding
Legacy video content archival and playback

Target Format

Flash Video

video/x-flv

FLV (Flash Video) is a container format that was used to deliver video content over the internet via Adobe Flash Player. It typically contains video encoded with Sorenson Spark or VP6 codecs and audio in MP3 or AAC format. FLV was once the dominant web video format but became obsolete after major browsers discontinued Flash Player support in 2020.

Advantages

Compact file sizes with acceptable streaming quality
Simple container structure that is quick to parse
Large existing archive of legacy web video content

Limitations

Obsolete format since Adobe Flash Player reached end-of-life in 2020
No modern browser supports FLV playback without third-party tools
Limited codec support compared to modern containers like MP4

Common Uses

Legacy web video archives and content migration
Converting old Flash-based video content to modern formats
Historical video content from early streaming platforms

Frequently Asked Questions

Common questions about converting MPEG to FLV.

Related Conversions

Explore other conversions related to MPEG and FLV.

Other conversions from MPEG

MPEG to MP4 MPEG to AVI MPEG to MKV MPEG to MOV MPEG to WMV MPEG to WEBM MPEG to M4V MPEG to MPG MPEG to 3GP MPEG to OGV

Other conversions to FLV

MP4 to FLV AVI to FLV MKV to FLV MOV to FLV WMV to FLV WEBM to FLV M4V to FLV MPG to FLV 3GP to FLV OGV to FLV

Convert MPEG to FLV

Why Convert MPEG to FLV?

MPEG vs FLV: Format Comparison

How to Convert MPEG to FLV

Upload your MPEG video

Start the FLV conversion

Wait for the video conversion to complete

Download your .flv file

Tips for Converting MPEG to FLV

Why this conversion is worth doing

Match the format to the actual workflow

Watch for this limitation in the FLV output

Avoid transcoding unless necessary

Understanding MPEG and FLV Formats

MPEG Video

Advantages

Limitations

Common Uses

Flash Video

Advantages

Limitations

Common Uses

Frequently Asked Questions

What quality should I expect from the FLV output?

Does the MPEG to FLV conversion change my video resolution or frame rate?

What file size should I expect for the FLV output?

When should I convert MPEG to FLV instead of staying with MPEG?

What is the maximum MPEG file size I can convert?

Is my MPEG file safe and private when I upload it?

Related Conversions

Other conversions from MPEG

Other conversions to FLV