Convert Advanced Systems Format (.asf) to iPhone Video (.iphone-video) online for free. Fast, secure video conversion with no watermarks or registration.
Upload your .asf file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mp4 file when it's ready.
The iPhone Video preset generates H.264 1080p video with AAC audio at 192 kbps, tailored for the iPhone's OLED display and A-series hardware decoder. ASF files carrying WMV content cannot be played by the iPhone's native video apps. This conversion produces an MP4 file that leverages the iPhone's hardware video pipeline for smooth, battery-efficient playback at a resolution that matches the phone's screen.
iPhones do not include Windows Media codecs. While VLC for iOS can decode ASF files via software, this bypasses the hardware decoder, causing higher CPU usage, faster battery drain, and potential frame drops on complex content. Converting to the iPhone preset enables native playback through the Photos, TV, or Files app with full system integration — AirPlay, SharePlay, Lock Screen controls, and Picture-in-Picture.
The preset uses H.264 High Profile Level 4.0 at up to 1920x1080 resolution with a target bitrate of 4-6 Mbps. Audio is encoded as AAC-LC at 192 kbps stereo. The output is an MP4 container with the moov atom at the file start for instant playback. The encoder uses reference frames and B-frames appropriate for the iPhone's hardware decoder capabilities.
On the iPhone's 6.1-6.7 inch display, 1080p H.264 at 4-6 Mbps is visually indistinguishable from higher bitrates. The OLED screen's contrast ratio masks minor compression artifacts. Audio at 192 kbps AAC sounds excellent through both the phone speaker and AirPods.
| Device | ASF | iPhone Video |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
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
Converting ASF to iPhone Video format ensures native, battery-efficient playback with full iOS integration, bringing Windows Media content into Apple's mobile ecosystem seamlessly.
Turvallinen siirto
HTTPS-salatut lataukset
Yksityisyys ensin
Tiedostot poistetaan automaattisesti käsittelyn jälkeen
Ei rekisteröitymistä
Aloita muuntaminen heti
Toimii kaikkialla
| No |
8MB free, 50MB Nitro
Mikä tahansa selain, mikä tahansa laite
| Ominaisuus | ASF | iPhone Video |
|---|---|---|
| Koko nimi | Advanced Systems Format | iPhone Compatible Video |
| Tiedostopääte | .asf | .mp4 |
| Paras käyttökohde | Streaming optimized | iPhone optimized |