确保已下载ffmpeg软件，可以在命令行运行ffmpeg命令。
ffmpeg version N-113561-ge05d3c1a16-20240207 Copyright (c) 2000-2024 the FFmpeg developers
built with gcc 13.2.0 (crosstool-NG 1.25.0.232_c175b21)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2 --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp --extra-version=20240207
libavutil 58. 36.101 / 58. 36.101
libavcodec 60. 39.100 / 60. 39.100
libavformat 60. 20.100 / 60. 20.100
libavdevice 60. 4.100 / 60. 4.100
libavfilter 9. 17.100 / 9. 17.100
libswscale 7. 6.100 / 7. 6.100
libswresample 4. 13.100 / 4. 13.100
libpostproc 57. 4.100 / 57. 4.100
Universal media converter
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Use -h to get full help or, even better, run 'man ffmpeg'用json的形式显示c.mkv视频的所有字幕信息
ffprobe -v error -select_streams s -show_entries stream=index:stream_tags=language,title -of json c.mkv{
"programs": [
],
"streams": [
{
"index": 2,
"tags": {
"language": "eng",
"title": "Forced"
}
},
{
"index": 3,
"tags": {
"language": "eng"
}
},
{
"index": 4,
"tags": {
"language": "eng",
"title": "SDH"
}
},
{
"index": 5,
"tags": {
"language": "ara"
}
},
{
"index": 6,
"tags": {
"language": "bul"
}
},
{
"index": 7,
"tags": {
"language": "chi",
"title": "Chinese (Simplified)"
}
},
{
"index": 8,
"tags": {
"language": "chi",
"title": "Chinese (Traditional)"
}
},
{
"index": 9,
"tags": {
"language": "cze"
}
},
{
"index": 10,
"tags": {
"language": "dan"
}
},
{
"index": 11,
"tags": {
"language": "ger"
}
},
{
"index": 12,
"tags": {
"language": "gre"
}
},
{
"index": 13,
"tags": {
"language": "spa",
"title": "Spanish (Latin America)"
}
},
{
"index": 14,
"tags": {
"language": "spa",
"title": "Spanish (Spain)"
}
},
{
"index": 15,
"tags": {
"language": "est"
}
},
{
"index": 16,
"tags": {
"language": "fin"
}
},
{
"index": 17,
"tags": {
"language": "fre",
"title": "French (Canada)"
}
},
{
"index": 18,
"tags": {
"language": "fre",
"title": "French (France)"
}
},
{
"index": 19,
"tags": {
"language": "heb"
}
},
{
"index": 20,
"tags": {
"language": "hin"
}
},
{
"index": 21,
"tags": {
"language": "hun"
}
},
{
"index": 22,
"tags": {
"language": "ind"
}
},
{
"index": 23,
"tags": {
"language": "ita"
}
},
{
"index": 24,
"tags": {
"language": "jpn"
}
},
{
"index": 25,
"tags": {
"language": "kor"
}
},
{
"index": 26,
"tags": {
"language": "lit"
}
},
{
"index": 27,
"tags": {
"language": "lav"
}
},
{
"index": 28,
"tags": {
"language": "may"
}
},
{
"index": 29,
"tags": {
"language": "dut"
}
},
{
"index": 30,
"tags": {
"language": "nor"
}
},
{
"index": 31,
"tags": {
"language": "pol"
}
},
{
"index": 32,
"tags": {
"language": "por",
"title": "Portuguese"
}
},
{
"index": 33,
"tags": {
"language": "por",
"title": "Portuguese (Brazil)"
}
},
{
"index": 34,
"tags": {
"language": "rus"
}
},
{
"index": 35,
"tags": {
"language": "slo"
}
},
{
"index": 36,
"tags": {
"language": "slv"
}
},
{
"index": 37,
"tags": {
"language": "swe"
}
},
{
"index": 38,
"tags": {
"language": "tam"
}
},
{
"index": 39,
"tags": {
"language": "tel"
}
},
{
"index": 40,
"tags": {
"language": "tha"
}
},
{
"index": 41,
"tags": {
"language": "tur"
}
},
{
"index": 42,
"tags": {
"language": "ukr"
}
},
{
"index": 43,
"tags": {
"language": "vie"
}
},
{
"index": 44,
"tags": {
"language": "chi",
"title": "Chinese (Traditional)"
}
}
]
}导出指定语言的字幕文件
ffmpeg -i c.mkv -map "0:44" output.chi.srt0:44中的44为上方字幕信息中的index数值。
output.chi.srt为导出后的字幕文件名。
将指定字幕文件加入到c.mkv视频上，并且转为mp4格式
ffmpeg -i c.mkv -vf "subtitles=input.srt" output.mp4input.srt为指定的字幕文件。
output.mp4为转换后的视频文件名称。