MP4koodekeissa

MP4koodekeissa refers to the audio and video compression standards used within the MP4 container format. The MP4 container, officially known as ISO Base Media File Format, is a highly versatile digital multimedia container format. It can store various types of data, including video, audio, subtitles, and metadata. However, the container itself does not perform the compression; that task is handled by codecs.

Commonly associated with MP4 files are the H.264 (AVC) and H.265 (HEVC) video codecs. H.264 is a widely adopted standard known for its good compression efficiency and compatibility across many devices. H.265, a successor to H.264, offers significantly improved compression, allowing for higher quality video at lower bitrates, making it ideal for high-definition and ultra-high-definition content. Other video codecs can also be used within an MP4 container, though less frequently.

For audio, MP4 files commonly employ codecs like AAC (Advanced Audio Coding) and MP3. AAC is a popular choice due to its excellent audio quality and compression capabilities, often surpassing MP3. ALAC (Apple Lossless Audio Codec) is another option for lossless audio within MP4. The specific combination of video and audio codecs determines the overall efficiency and quality of the media file. When playing an MP4 file, a compatible player needs to have the necessary codecs installed to decode and render the audio and video streams.