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jpeg转换mp4

在线计算网 · 收录于 2022-08-08 11:41:04

jpeg怎么转换成mp4

jpeg格式介绍

  • 文件扩展名.jpeg
  • 文件类别images
  • 程序Adobe PhotoshopApple PreviewCorel Paint Shop Pro
  • 主程序MS Paint
  • 说明JPEG – is a popular graphic format, which is characterized by a high degree of compression, which leads to a decrease in image quality. It uses the technology of encoding of smooth color renditions, providing the ability to reduce the amount of data frequently during the recording of the image. Because of the small size it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPEG algorithm is optimally suitable for compressing photographs and pictures, in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics, since a strong contrast between a number of closely located pixels provokes the appearance of visible artifacts.
  • 技术细节The procedure for compressing the digital images in JPEG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded. JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial.
  • MIME类型image/jpeg

mp4格式介绍

  • 文件扩展名.mp4
  • 文件类别video
  • 程序Microsoft Windows Media PlayerVLC media playerMPlayerEltima Elmedia PlayerWinampApple QuickTime PlayerApple iTunes
  • 说明MP4文件(MPEG-4)是同时与多个电台和视频播放器一起使用的多媒体文件,它们甚至可以存储视频,音频和其他适当数量的数据字幕。 MP4文件格式是一种非常常见的文件格式,因为它有自己的容器格式,它也可以用于多种平台,如iTunes,PlayStation和便携式PSP。
  • 技术细节MP4文件的技术细节在很大程度上有所不同,并且在2001年首次根据ISO / IEX 14496-1:2001标准发布,它使用AAC编码来消除未经授权的用户复制数据。 主要目的是流式传输而不是发送视频或音频信息。 MP4文件可用于存储其他数据,如文本信息,字幕和静止图像,而MPEG格式无法做到这一点,无论如何将数据处理成MPEG-4第14部分需要使用私有流,例如使用提示跟踪以包含信息。
  • MIME类型audio/mp4video/mp4

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