3GP was designed for older GSM and WCDMA mobile networks, encoding video in H.263 at resolutions as low as 176x144 with AMR audio. The generic mobile video preset targets modern smartphones by encoding H.264 Baseline video at 480p in an MP4 container with AAC audio — a universal configuration that plays on every iPhone, Android, and Windows Phone device produced in the last decade. This conversion bridges the gap between legacy carrier-era video and today's smartphone standard.

Modern smartphones expect MP4/H.264 video with AAC audio. While they may technically support some 3GP variants, playback is often unreliable — gallery apps may not generate thumbnails, sharing apps may refuse to attach the file, and hardware video decoders may not engage for H.263 content, causing excessive battery drain during software decoding. Converting to a standard mobile video profile eliminates all these issues with a single, universal output format.

FFmpeg transcodes 3GP video to H.264 Baseline profile at 480p (or original resolution if lower) with AAC-LC audio at 128 kbps. The Baseline profile ensures compatibility with even the oldest smartphones still in use. CRF encoding targets efficient file sizes. The MP4 container is written with faststart for streaming playback. Aspect ratio is preserved with pillarboxing or letterboxing if necessary.

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

480p (854x480) or the original resolution if it is lower. Most 3GP files are well under 480p, so the original dimensions are preserved — upscaling is not performed by default.

Yes. H.264 Baseline in MP4 with AAC audio is the universal mobile video standard. It works on every iPhone since iPhone 3GS and every Android since version 3.0.

Yes. WhatsApp accepts MP4/H.264 up to 16 MB (or 64 MB sent as document). The mobile-optimized output is specifically designed for this use case.

The mobile preset uses more conservative settings (Baseline profile, 480p cap) to ensure compatibility across all devices. The Android and iPhone presets may use higher profiles for better compression on those specific platforms.

It varies. H.264 is more efficient than H.263, so files are often 20-40% smaller at equal quality. If the 3GP used H.264 already, sizes will be similar.

Device	3GP	Mobile Video
Windows PC	Partial	Partial
macOS	Partial	Partial
iPhone/iPad	Partial	Partial
Android	Native	Partial
Linux	Partial	Partial
Web Browser	No	No

Egenskap	3GP	Mobile Video
Fullt navn	3GPP Multimedia	Mobile Device Video
Filendelse	.3gp	.mp4
Best egnet for	Mobile optimized	Universal mobile

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