AMR (Adaptive Multi-Rate) is a audio data compression format, optimized for speech coding, an 3GPP-specified 3GP container format, used by mobile telephone handsets for voice recordings.Basically, this format is currently supported by almost all platforms, software, players and browsers. This format is the most common container format and is widely used due to is cross-platform feature. MP4 (MPEG-4 Video) is a multimedia container and a compression standard for video, audio and other data (such as subtitle, image, text and more), developed by the Moving Picture Experts Group (MPEG).If the source file is a very large file, it will take more time to upload, be sure to select a valid file.This converter cannot support encrypted or protected audio files.If the file upload process takes a long time or is unresponsive or very slow, please try to cancel and resubmit.Before uploading, please make sure you agree to the terms of this website.The maximum upload file size is 200 MB.Once the upload is complete, the converter will redirect a web page to display the conversion results.Click the "Convert" button to start uploading your files.The tool will try to maintain the audio quality of the source MP4 file and create a high quality AMR file as much as possible.
I get some MP4 videos and want to convert MP4 to AMV for my players. to AMV Or want to convert AMV to MP4/MP4 for media player This post recommends the best AMV converter to help you make the AMV video conversion without any quality loss. This free MP4 to AMR converter can help you convert MP4 (MPEG-4 Video) audio to AMR (Adaptive Multi-Rate) audio. Convert Video Have the need to convert MP4, AVI, M4V, MP3, etc.
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