免费转换 MPEG-2 文件

MPEG-4第14部分 - 全球最通用的视频格式，支持H.264、H.265（HEVC）和各种音频编解码器。质量、压缩和兼容性的完美平衡。几乎在所有设备上播放（手机、平板电脑、计算机、电视、游戏机）。YouTube、流媒体服务和视频分享的标准。支持章节、字幕和多音轨。自2001年以来的行业标准。适用于任何视频分发场景。

Audio Video Interleave - legacy Windows multimedia container format from 1992. Flexible container supporting virtually any codec. Larger file sizes than modern formats. Universal compatibility with Windows software and older devices. Simple structure making it easy to edit. Common in video editing and legacy content. Being replaced by MP4 and MKV but still widely supported. Perfect for maximum compatibility with older Windows systems and software.

Matroska - 灵活的开源容器，支持无限的视频/音频轨道、字幕、章节和元数据。可以包含任何编解码器（H.264、H.265、VP9、AV1）。非常适合高质量视频档案，具有多种音频语言和字幕轨道。流行于HD/4K电影和蓝光拷贝。支持高级功能，如有序章节和菜单系统。非常适合复杂的多轨视频。高质量视频集合的标准格式。

QuickTime Movie - Apple's multimedia container format with excellent quality and editing capabilities. Native format for macOS and iOS devices. Supports various codecs including ProRes for professional video. High-quality preservation suitable for editing. Larger file sizes than compressed formats. Perfect for video production on Mac, professional editing, and scenarios requiring maximum quality. Standard format for Final Cut Pro and professional Mac workflows.

Windows Media Video - Microsoft's video codec and container format optimized for Windows Media Player. Good compression with acceptable quality. Native Windows support and streaming capabilities. Various versions (WMV7, WMV8, WMV9/VC-1). Used for Windows-based streaming and video distribution. Being superseded by MP4 and other formats. Perfect for legacy Windows systems and corporate environments using Windows Media infrastructure. Still encountered in Windows-centric content.

Flash Video - legacy format for Adobe Flash Player used extensively for web video (2000s). Enabled YouTube's early growth and online video streaming. Now obsolete due to Flash discontinuation (2020). Small file sizes with acceptable quality for the era. No longer recommended for new projects. Convert to MP4 or WebM for modern compatibility. Historical format important for archival but not for new content.

WebM - open-source video format developed by Google specifically for HTML5 web video. Uses VP8/VP9/AV1 video codecs with Vorbis/Opus audio. Royalty-free with no licensing costs. Optimized for streaming with efficient compression. Native support in all modern browsers. Smaller file sizes than H.264 at similar quality. Perfect for web videos, HTML5 players, and open-source projects. Becoming standard for web-native video content.

Ogg Video - 来自Xiph.Org基金会的开源视频格式，使用Theora视频编解码器和Vorbis/Opus音频。没有专利和许可费用。用于开源项目和HTML5视频。与早期的H.264相当，但被VP9和AV1取代。使用逐渐减少，倾向于WebM。非常适合需要免费编解码器的开源应用程序。转换为WebM或MP4以获得更好的兼容性和质量。在开放视频标准中具有历史重要性。

MPEG-4 Video - Apple's variant of MP4 for iTunes and iOS with optional DRM protection. Nearly identical to MP4 but may contain FairPlay DRM. Used for iTunes Store purchases and Apple TV content. Supports H.264/H.265 video and AAC audio. Includes chapter markers and metadata. Convert to MP4 for broader compatibility (if DRM-free). Perfect for iTunes library and Apple ecosystem. Essentially MP4 with Apple-specific features.

MPEG - 使用MPEG-1或MPEG-2压缩的遗留视频格式。视频CD和DVD的标准。质量良好，压缩适中。与旧设备的通用兼容性。文件比现代格式大。非常适合DVD兼容性和遗留系统。正在被MP4取代。转换为MP4以获得更好的压缩和兼容性。

MPEG视频 - 用于各种视频应用的通用MPEG格式（MPEG-1/2/4）。MPEG视频标准的容器。广播和DVD制作中常见。根据MPEG版本的不同，质量水平各异。非常适合广播和专业视频。现代等效格式为MP4。转换为MP4以适应当代使用。

视频对象 - 包含MPEG-2视频和AC-3/PCM音频的DVD视频容器格式。DVD-Video规范的一部分。在商业DVD上使用CSS加密。包括字幕、菜单数据和多个音轨。大文件大小，DVD的最大质量。非常适合DVD制作和DVD备份。转换为MP4或MKV以获得更小的文件大小和更广泛的播放兼容性。

AVCHD视频 - 来自Sony/Panasonic高清摄像机的高清晰度视频格式。使用MPEG-4 AVC/H.264压缩，扩展名为.mts。属于AVCHD（高级视频编码高清）标准。全高清1080p/1080i录制。非常适合摄像机录像的保存。转换为MP4以便于编辑和分享。来自Sony、Panasonic和Canon高清摄像机的标准格式。

蓝光MPEG-2传输流 - 包含H.264、MPEG-2或VC-1视频的蓝光光盘视频格式。高质量的HD/4K视频，最高比特率可达40Mbps。用于蓝光光盘和AVCHD摄像机。支持多个音轨和字幕。非常适合蓝光备份和高质量档案。转换为MP4或MKV以获得更小的文件大小。HD/4K内容的优质格式。

第三代合作伙伴计划 - 为CDMA2000 3G手机设计的移动视频格式，具有小文件大小和低比特率。针对有限的移动带宽和处理能力进行了优化。支持H.263、MPEG-4和H.264视频。非常小的文件大小（每分钟10-100KB）。早期智能手机时代的遗留格式。正在被MP4取代以适应移动视频。对于极低带宽场景仍然有用。转换为MP4以适应现代设备。

3GPP2 - 为CDMA2000 3G手机设计的移动视频格式。类似于3GP，但用于CDMA网络（Verizon、Sprint）。非常小的文件大小，针对移动网络进行了优化。支持H.263、MPEG-4和H.264视频。遗留移动格式。转换为MP4以适应现代设备。被标准MP4取代。

RealMedia - 来自RealNetworks的专有流媒体格式（1990年代至2000年代）。针对低带宽流媒体进行了优化。按现代标准质量较差。过时格式，播放器支持有限。转换为MP4以适应现代播放。在早期互联网视频流媒体中具有历史重要性。

RealMedia可变比特率 - 改进的RealMedia格式，具有可变比特率编码。比RM在相似文件大小下质量更好。亚洲在视频分发中流行。过时格式，需要RealPlayer。转换为MP4或MKV以获得现代兼容性。来自RealNetworks的遗留格式。

Advanced Systems Format - Microsoft's streaming media container for Windows Media. Used for WMV and WMA streaming. Supports live streaming and DRM protection. Common in Windows Media Services. Being replaced by modern streaming technologies. Convert to MP4 for universal compatibility. Microsoft legacy streaming format.

Shockwave Flash - Adobe Flash animation and video format. Interactive multimedia content with vector graphics and scripting. Obsolete since Flash end-of-life (December 2020). Security risks from Flash Player. Convert videos to MP4, animations to HTML5/SVG. Historical format from web animation era.