Free online RM to 264 converter
Convert RealMedia video to a raw H.264 stream with FFmpeg or the page converter.
Convert RM to 264 online - free
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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 .rm 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 .rm to .264 conversion
After successful file upload, click to convert when you are ready.
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Download converted .264 file
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How to convert rm to 264 file
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Some hardware decoders and video tools accept raw H.264 elementary streams but not older RealMedia clips, so an RM video must be re-encoded before use. The resulting .264 file contains video only; it does not retain the RM audio track.
What the RM format is
RM (RealMedia) is a container developed by RealNetworks for streaming and storing media, commonly using RealVideo for video and RealAudio for sound. RealNetworks RealProducer created RM files, and they are often found in older streamed or downloaded clips and opened with RealPlayer or compatible software.
What the 264 format is
A .264 file usually holds a raw H.264/AVC video stream, also called an elementary stream. It is useful when a decoder or video-processing workflow specifically requires H.264 data without a container such as MP4 or MKV. The stream is compact and widely supported by H.264 decoders, but it has no container-level audio, subtitles, indexing, or timestamps.
How to convert RM to 264
Online on 101convert.com
- Upload the RM file to the converter on this page. The per-file size limit is shown on the page.
- Choose 264 as the output format and start the conversion. The conversion runs on the site’s server with FFmpeg.
- Download the converted
.264file.
Offline with desktop software
FFmpeg is free and runs on Windows, macOS, and Linux. Use a build with the libx264 encoder, then run:
ffmpeg -i input.rm -map 0:v:0 -c:v libx264 -crf 23 -preset medium -an -f h264 output.264
Replace input.rm with the source filename. The command encodes the first video stream, omits audio, and writes a raw H.264 stream; -crf 23 sets a typical lossy quality level, and a lower CRF produces higher quality and a larger file.
Quality and compatibility
Re-encoding is lossy, so it cannot restore detail absent from the RM source. FFmpeg must support the source’s RealVideo codec to decode it. Because a raw .264 stream lacks a container and audio track, some players handle it less conveniently than an MP4 or MKV; use a container format instead if you need synchronized audio, subtitles, or easier seeking.
Note: This rm to 264 conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
RM vs 264: format comparison
How the RM and 264 formats compare on the properties that matter most for this conversion.
| Property | .RM RealMedia | .264 H.264 / AVC elementary stream |
|---|---|---|
| Format type | Container | Codec |
| Compression | Lossy | Lossy |
| Maximum resolution | HD (1080p) | 8K and above |
| Audio tracks | One | None |
| Subtitles | — | Not supported |
| Streaming | Partial | Partial |
| Opens in a web browser | No | No |
| Typical file size | Small | Very small |
| Open standard | No | Yes |
| Introduced | 1995 | 2003 |
| Developer | RealNetworks | ITU-T / ISO/IEC JTC 1 |
| MIME type | application/vnd.rn-realmedia | video/H264 |
Information about file extensions and file types is provided by File-Extensions.org
Frequently asked questions
Is the RM to 264 converter free?
Yes, converting RM to 264 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 RM file be?
You can upload RM files up to 30 MB and convert up to 1 files at once in a single batch. With a paid plan the limit is up to 2000 MB per file and 1 files at once, see our plans.
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 RM to 264?
No. The RM to 264 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 RM file for this RM to 264 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.