MPEG is a Moving Pictures Experts Group video file that is compressed using MPEG-1 or MPEG-2 compression. Youtube HD 1080p25 = 8 Mbps. I don't see a difference as dramatic as you do. It's just a trick to save on bitrate, thereby making the file size smaller. Throw 8 Mbps at an SD video source with MPEG-2 and MPEG4-ASP and MPEG-4 ASP doesn't really offer you much more. These are ideal for DVDs and TV broadcasts. The MPEG-2 uses H.262 encoding while MPEG-4 uses H.264. MPEG-4 is the latest standard. Typically, MPEG files come with a .mpg or .mpeg file extensions. As a way of bringing clarity to this difference, we will explain how MPEG-2 and MPEG-4 encoders handle compression, file size, quality, and application. The familiar parts for people include MPEG-4 Part 2, MPEG-4 part 10 (MPEG-4 AVC/H.264 or Advanced Video Coding). MPEG2 vs MPEG4 - File Size MPEG4 encodes video files with much smaller size as it can produce a full-length movie file less than 1G while MPEG2 can only yield movie files with 5 times the size. But it was re-released in 2003 as the MPEG-4 Part 14 version that we see today. Key points of MPEG-4 are the following: ----- File Size Compared to MPEG-2 files, MPEG-4 files take up less memory size. • Compression of the MPEG-4 is relatively complex compared to MPEG-2. MPEG2 vs MPEG4 • MPEG-2 and MPEG-4 are two releases of the ISO standards for digital audio and video. Cover-all Video Converter & Downloader for H264 MPEG4 MacX Video Converter Pro - seamlessly convert H264 MPEG4 video and compress videos to smaller file size for uploading to YouTube, Vimeo or E-mail with intact quality. 482.25 K B/megapixel-sec x 2.07 M pixels MPEG-2. Re:MPEG-2 vs MPEG-4 by r. proffitt Forum moderator Nov 8, 2003 7:23AM PST Since you can set quality levels in both, file size can be equal in both, but frankly MPEG-4 wins. If you want to see the difference for yourself, try encoding a 1 minute 720x480 clip to xvid using a bitrate of 2000kbps, and the same clip to mpeg-2 using the same bitrate. File size for 1 second. The disadvantage of MPEG2 is its inability to shrink the file size. This is because MPEG-4 compression algorithm is designed to create files, which can be transported over the Internet, and streamed on multiple network platforms. There are many MPEG formats, including MPEG-1, MPEG-2, MPEG-4 (for streaming DVD contents), MPEG-7, and MPEG-21. This is because MPEG2 files are generally used for storage on DVD, thereby resulting in larger file sizes. MP4 is the most common video file format featuring multiple-functionality and high compression. The advantage of MPEG2 is that it maintained the high quality of video files. You can store MPEG2 files on DVDs for many DVD capacity is larger than 4 GB, but it is not applicable to portable devices. It was introduced in late 1998 and designated a standard for a group of audio and video coding formats and related technology agreed upon by the ISO/IEC Moving Picture Experts Group (MPEG) (ISO/IEC JTC1/SC29/WG11) under the formal standard ISO/IEC 14496 – Coding of audio-visual objects. MP4, also known as MPEG-4 Part 14, was originally created in 2001 based on the QuickTime File Format MOV. The primary uses for the MPEG-4 standard are web (streaming media) and CD distribution, and broadcast television. Usually, MPEG2 video files are more massive. It can not only save videos, but also audio, subtitles and images. MPEG-2 encoders have been around since the late 1990s and are responsible for great strides in the capabilities of video encoding as compared to their predecessor, MPEG-1. 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