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MP4 is one of the most widely used video formats, known for its excellent balance between video quality and file size. It’s compatible with almost all media players and devices, making it ideal for streaming, sharing, and storing videos. MP4 files can contain video, audio, subtitles, and images in a single container.
AAC is an audio file format that works similar to MP3 but compresses more than MP3. It significantly reduces the audio file size without losing the quality. To reduce the file size it uses the MPEG-4 standard to cut off the low frequency sounds that cannot be heard in a human’s ear.