Free online MPEG to FLV converter
Convert MPEG video to legacy-compatible FLV with FFmpeg or 101convert.
Convert MPEG to FLV online - free
Your file is processed instantly and deleted as soon as you download it.
Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .mpeg file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .mpeg to .flv conversion
After successful file upload, click to convert when you are ready.
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Download converted .flv file
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How to convert mpeg to flv file
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Legacy Flash players, embedded video systems, and older publishing workflows may require an .flv file instead of an MPEG program stream. Converting also helps when software accepts FLV but cannot decode the source MPEG-1 or MPEG-2 stream.
What the MPEG format is
MPEG is a family of video and audio compression standards, not one single format. Files ending in .mpg or .mpeg commonly contain MPEG-1 or MPEG-2 video with MP2 audio, although some files use other audio codecs; MPEG-4 video is more often stored in containers such as MP4, so the filename extension alone does not identify the codecs.
MPEG-1 files occur in VCD-era software and archives. MPEG-2 is common in DVD authoring, digital television captures, camcorders, and video-capture hardware. These sources often contain interlaced video and MPEG program streams, which can cause playback or editing problems in newer applications.
What the FLV format is
FLV (Flash Video) is a container designed for progressive network playback and Adobe Flash Player. It can store H.264 video with AAC audio, or older VP6 video with MP3 or Nellymoser audio. H.264/AAC usually provides better quality and broader support than the older VP6/MP3 combination.
FLV remains relevant to legacy media servers, archived Flash websites, and applications that explicitly require an .flv file. It is not a modern browser format: Flash Player has been discontinued, and current websites generally use MP4, WebM, or adaptive streaming formats.
How to convert MPEG to FLV
Using FFmpeg
FFmpeg is the most controllable desktop option and runs on Windows, macOS, and Linux. Open a terminal in the folder containing the source file and run:
ffmpeg -i input.mpg -c:v libx264 -pix_fmt yuv420p -preset medium -crf 23 -c:a aac -b:a 128k -ar 44100 -f flv output.flv
Replace input.mpg and output.flv with the actual filenames. This decodes the MPEG stream and re-encodes it as H.264 video and AAC audio inside an FLV container. A lower CRF value produces higher quality and a larger file; values from about 18 to 28 are practical for H.264. Use a fixed bitrate when required by a legacy server, for example -b:v 1500k instead of -crf 23.
MPEG-2 sources are often interlaced. If the converted video shows comb-shaped artifacts on a progressive display, deinterlace during encoding:
ffmpeg -i input.mpg -vf yadif -c:v libx264 -pix_fmt yuv420p -crf 23 -c:a aac -b:a 128k -f flv output.flv
Do not deinterlace automatically when the destination supports interlaced playback; retaining the fields can preserve motion detail. Check the result with:
ffprobe output.flv
Verify that the output contains the codecs required by the target application, has the expected frame rate and duration, and plays correctly. Current HandBrake releases are not suitable when FLV is mandatory because FLV is not one of their standard output containers; use FFmpeg or a graphical converter that explicitly supports FLV with H.264 and AAC.
Using the online converter
At 101convert.com, upload the MPEG file, select FLV as the output format, start the conversion, and download the generated file. The service can be used free without installing software; upload limits, processing time, and file-retention rules depend on the service.
Quality and compatibility caveats
Encoding MPEG video as H.264 normally causes a generation of quality loss. Re-encoding cannot restore detail already lost in the source, so keep the original MPEG file and avoid repeated conversions. A remux without re-encoding is possible only when the source video and audio codecs are accepted by the target FLV player; MPEG-1 or MPEG-2 streams are not reliably supported by older FLV software, making H.264/AAC encoding the safer choice.
Some legacy FLV players accept only VP6 video or MP3 audio, while others support H.264/AAC. Check the target application's codec requirements before converting. An FLV file will not become playable in software that has removed Flash or lacks an FLV demuxer, and converting to FLV does not restore Flash support in modern browsers.
MPEG vs FLV: format comparison
How the MPEG and FLV formats compare on the properties that matter most for this conversion.
| Property | .MPEG Moving Picture Experts Group video file | .FLV Flash Video |
|---|---|---|
| Format type | Container | Container |
| Compression | Both | Both |
| Maximum resolution | 8K and above | 4K |
| Audio tracks | Multiple | One |
| Subtitles | Embedded in the file | Embedded in the file |
| Streaming | Partial | Partial |
| Opens in a web browser | Partial | Partial |
| Typical file size | Large | Small |
| Open standard | Yes | Partly open |
| Introduced | 1993 | 2002 |
| Developer | Moving Picture Experts Group (MPEG), ISO/IEC | Adobe Systems / Macromedia |
| MIME type | video/mpeg | video/x-flv |
Suggested software and links: mpeg to flv converters
Frequently asked questions
Is the MPEG to FLV converter free?
Yes, converting MPEG to FLV on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my MPEG file be?
You can upload MPEG files up to 2000 MB and convert up to 1 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert MPEG to FLV?
No. The MPEG to FLV conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid MPEG file for this MPEG to FLV conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.
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mpeg file conversion
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