The iPhone Video preset creates H.264 MP4 files specifically optimized for iPhone's hardware video decoder and display characteristics. RMVB's RealVideo codecs are completely unsupported by iOS — the iPhone has never included a RealMedia decoder in its media framework. For the large number of users in China and Southeast Asia with RMVB collections, this conversion is the only way to watch that content natively on iPhone.

iPhone cannot decode RMVB at all through native APIs. While VLC for iOS can software-decode RMVB, it's inefficient, drains battery rapidly, and may stutter on complex scenes. Converting to the iPhone Video preset uses the dedicated H.264 hardware decoder for smooth, power-efficient playback with proper iOS integration (AirPlay, PiP, share sheet).

FFmpeg decodes RealVideo 8/9/10 streams and RealAudio, then encodes to H.264 Main Profile Level 3.1 with CRF 23 and AAC-LC at 128 kbps stereo. Resolution from RMVB sources is maintained at native size or scaled to 1920x1080 maximum. The MP4 container uses faststart for progressive playback.

Resolution: 1920x1080

Bitrate: 8-12 Mbps

H.264 recommended for fast processing

Resolution: 1080x1080

Bitrate: 3.5 Mbps

Square or 9:16 for Reels

Resolution: 1080x1920

Bitrate: 4 Mbps

9:16 vertical, under 60s ideal

Resolution: 1280x720

Bitrate: 5 Mbps

Under 140s, 512MB max

Resolution: 960x540

Bitrate: 2 Mbps

16MB limit for standard, 64MB for document

Resolution: 1280x720

Bitrate: 4 Mbps

8MB free, 50MB Nitro

VLC for iOS can decode RMVB through software, but it's battery-intensive and may stutter. Converting to H.264 enables hardware decoding — smoother playback with half the battery drain.

At CRF 23, the MP4 is typically similar in size to the RMVB. If you want smaller files, use CRF 26-28 — on iPhone's small screen, the quality difference is minimal.

AirDrop from a Mac is fastest. Alternatively, use Files app with iCloud Drive, Google Drive, or import via iTunes/Finder sync.

Yes — hardcoded (burned-in) subtitles are part of the video image and are always preserved. They're treated as regular pixel data.

Yes — the converted H.264 MP4 supports AirPlay to Apple TV, HomePod, and other AirPlay receivers.

Device	RMVB	iPhone Video
Windows PC	Partial	Partial
macOS	Partial	Partial
iPhone/iPad	Partial	Partial
Android	Partial	Partial
Linux	Partial	Partial
Web Browser	No	No

Jellemzo	RMVB	iPhone Video
Teljes nev	RealMedia Variable Bitrate	iPhone Compatible Video
Kiterjesztes	.rmvb	.mp4
Leginkabb ajanlott	Variable bitrate	iPhone optimized

Convert RMVB to iPhone Video — Free Online Converter

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