3GP to MP4 Converter

Kept

• Small videos from old phones are read, including their AMR and AAC audio
• H.264 video with AAC audio, the combination that plays on every phone, computer, TV and browser
• The file is set up for streaming, so it starts playing before it has fully downloaded
• The original resolution and frame rate are kept
• A phone video recorded sideways or upside down is turned the right way up
• Surround sound (5.1) is kept when the source has it

Good to know

• 3GP clips are tiny to begin with, so the result is as small and low-quality as the original. Nothing is scaled up.
• The video is re-encoded, which is slightly lossy. Only one video track and one audio track are kept; extra audio tracks and subtitles are left out.
• A width or height that is an odd number of pixels is trimmed by one pixel, because video encoders need even sizes.
• HDR video (for example from a recent iPhone) is converted to normal SDR colors, and 10-bit video becomes 8-bit, so it plays everywhere.
• Files up to 150 MB are accepted. Long or very high-resolution videos can take several minutes, and a conversion that runs past about 4 minutes is stopped with a message.