Video Conversion
Convert MP4 to RM Online — Free
Fast, free MP4 to RM converter. No registration required.
或从以下导入
200万+文件已转换
数千用户的信赖之选
安全传输
HTTPS 加密上传
隐私优先
文件处理后自动删除
无需注册
即刻开始转换
随处可用
任何浏览器，任何设备
如何转换
1
Upload your .mp4 file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .rm file when it's ready.
什么是 MP4？
MP4 is the most widely used video container format. It stores video, audio, subtitles, and metadata. Compatible with virtually every device and platform, from smartphones to smart TVs.
格式详情
- 全称
- MPEG-4 Part 14
- 扩展名
- .mp4
主要特点
- Universal compatibility
- Streaming support
- Small file sizes
- Hardware-accelerated playback
什么是 RM？
RM is RealNetworks' proprietary multimedia container format. It was the dominant streaming video format on the early internet through RealPlayer but has been largely obsoleted by modern codecs and containers.
格式详情
- 全称
- RealMedia
- 扩展名
- .rm
主要特点
- Streaming format
- Low bandwidth
- Legacy support
- RealPlayer native
MP4 与 RM 对比
| 特性 | MP4 | RM |
|---|---|---|
| 全称 | MPEG-4 Part 14 | RealMedia |
| 扩展名 | .mp4 | .rm |
| 最适合 | Universal compatibility | Streaming format |
常见问题
Our converter preserves resolution, frame rate, and audio tracks by default. The RM output uses optimized codec settings to maintain quality as close to the original MP4 as possible.
Free users can convert videos up to 100MB. Pro users can convert files up to 2GB with server-side processing — no software installation needed.
Most videos convert in under 60 seconds. Longer or higher-resolution files may take 1-3 minutes. Processing runs on our servers, so your device stays fast.
Yes. Our video converter is browser-based — works on iPhone, Android, tablet, and desktop. No app download required.
Yes. Audio is preserved by default during video conversion. You can also adjust audio codec, bitrate, and volume in the advanced settings.