MKV视频格式转码MP4无损格式历程（ffmpeg教程）格式工厂转码底层用的就是这个！！

首先去往如下ffmpeg官方网站地址Download FFmpeghttps://ffmpeg.org/download.html

然后点击下载EXE格式的文件Builds - CODEX FFMPEG @ gyan.devhttps://www.gyan.dev/ffmpeg/builds/

下载这个Windows builds from gyan.dev

当前日期2023年8月1日下的最新版本下载链接如下——

https://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-2023-07-19-git-efa6cec759-essentials_build.7zhttps://www.gyan.dev/ffmpeg/builds/packages/ffmpeg-2023-07-19-git-efa6cec759-essentials_build.7z

输入如下命令即可

C:\xxxx\xxx\xxx\xxx>ffmpeg.exe -i 需转换的视频名称.mkv -y -vcodec copy -acodec aac -ab 320k 转换完成后的视频.mp4

C:\xxxx\xxx\xxx\xxx>ffmpeg.exe -i 需转换的视频名称.mkv -y -vcodec copy -acodec aac -ab 320k 转换完成后的视频.mp4
ffmpeg version 2023-07-19-git-efa6cec759-essentials_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      58. 14.100 / 58. 14.100
  libavcodec     60. 22.100 / 60. 22.100
  libavformat    60. 10.100 / 60. 10.100
  libavdevice    60.  2.101 / 60.  2.101
  libavfilter     9.  8.102 /  9.  8.102
  libswscale      7.  3.100 /  7.  3.100
  libswresample   4. 11.100 /  4. 11.100
  libpostproc    57.  2.100 / 57.  2.100
Input #0, matroska,webm, from '录制设备检测.mkv':
  Metadata:
    ENCODER         : Lavf60.3.100
  Duration: 00:02:27.70, start: 0.000000, bitrate: 3579 kb/s
  Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 60 fps, 60 tbr, 1k tbn
    Metadata:
      DURATION        : 00:02:27.700000000
  Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp
    Metadata:
      title           : simple_aac_recording0
      DURATION        : 00:02:27.669000000
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'demo.mp4':
  Metadata:
    encoder         : Lavf60.10.100
  Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 60 fps, 60 tbr, 16k tbn
    Metadata:
      DURATION        : 00:02:27.700000000
  Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 320 kb/s
    Metadata:
      title           : simple_aac_recording0
      DURATION        : 00:02:27.669000000
      encoder         : Lavc60.22.100 aac
[out#0/mp4 @ 00000213b63f8a40] video:60955kB audio:4656kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.388909%
frame= 8862 fps=401 q=-1.0 Lsize=   65866kB time=00:02:27.66 bitrate=3654.0kbits/s speed=6.69x
[aac @ 00000213b657b180] Qavg: 65508.570