![]() H.264 relies on x264 for encoded video (as well as others, such as DivX or XviD), and audio is often encoded using AAC or MP3 audio codecs depending on the size and quality you're targeting.Windows Media Player combines audio and video capabilities to centralize the music and videos that you store on your computer. It can use both lossy and lossless compression depending on the settings you choose while encoding, such as frame rate, quality, and target file size. H.264 is a relative Swiss Army knife of the codec world. Modern updates to MPEG–4 are now using H.264 as well. MPEG–4 Part II calls on video encoders such as DivX or XviD to encode the video, while audio is typically carried in MP3 format. MPEG–4 is the most common streaming format, and it consists of many parts, of which only MPEG–4 Part II applies for video coding. While still widely used, it's often strictly for video encoding and is often used with one of the more popular packs mentioned below. Both codecs can decode the output of the other, as they are both built on the implementation of MPEG–4. XviD/DivXĭivX is a commercially sold codec, while XviD is an open-source utility that functions as an alternative to its commercial cousin. Understanding where each codec is used can help you determine which codec you should use for your project. As you scale the video resolution, you must preserve the aspect ratio.Īs you might expect, some codecs are more popular than others. Aspect Ratio: 4:3 and 16:9 are the two most common aspect ratios.If you want to understand more about frame types and keyframes, check out our guide on keyframes for video editing. ![]() They play an important role in video compression and are of three types: I-frame (keyframe), P-frame, and B-frame. Frame Type: It describes the way picture data is structured in an MPEG stream or file. ![]() It is expressed in frames per second (FPS).
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