折腾：
【未解决】Mac中用ffmpeg调整mp4默认字幕为中文
期间，用：
➜ ffmpeg_edit_subtitle ffmpeg -i CTT_Folge_01_CH_Subs_DefaultZhcnButNotShow.mp4 -vf "ass=subtitle.ass" addedAssSubtitle.mp4 ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers built with Apple LLVM version 9.0.0 (clang-900.0.39.2) configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 / 4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'CTT_Folge_01_CH_Subs_DefaultZhcnButNotShow.mp4': Metadata: major_brand : mp42 minor_version : 512 compatible_brands: isomiso2avc1mp41 creation_time : 2018-10-13T03:27:31.000000Z encoder : HandBrake 1.1.2 2018090500 Duration: 00:26:52.03, start: -0.001333, bitrate: 1762 kb/s Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 1599 kb/s, 25 fps, 25 tbr, 90k tbn, 180k tbc (default) Metadata: creation_time : 2018-10-13T03:27:31.000000Z handler_name : VideoHandler Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 157 kb/s (default) Metadata: creation_time : 2018-10-13T03:27:31.000000Z handler_name : Stereo Stream #0:2(zho): Subtitle: mov_text (tx3g / 0x67337874), 1280x108, 0 kb/s (default) Metadata: creation_time : 2018-10-13T03:27:31.000000Z handler_name : SubtitleHandler Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help [AVFilterGraph @ 0x7fa224608740] No such filter: 'ass' Error reinitializing filters! Failed to inject frame into filter network: Invalid argument Error while processing the decoded data for stream #0:0 [aac @ 0x7fa226032a00] Qavg: 42469.492 [aac @ 0x7fa226032a00] 2 frames left in the queue on closing Conversion failed! ➜ ffmpeg_edit_subtitle
出错：
[AVFilterGraph @ 0x7fa224608740] No such filter: ‘ass’
-》之前也遇到类似错误：
[AVFilterGraph @ 0x7fc399d0a980] No such filter: ‘subtitles’
-》看来mp4，即没有subtitles，也有没ass的filter
再去试试
-vf ass=subtitles.ass
-》看到人说了：
“Use the libass library (make sure your ffmpeg install has the library in the configuration –enable-libass).”
-》发现和上面的错误是一个意思
-》不过，从之前的ffmpeg的输出看，此处的ffmpeg没有：enable-libass
所以现在是：
已经用了：
ffmpeg -i CTT_Folge_01_CH_Subs_DefaultZhcnButNotShow.mp4 -i subtitle.srt -c copy -c:s mov_text movTextSubtitle.mp4
把srt的字幕 添加到mp4了
-》但是还是只是subtitle stream，而不是burned in=embed=嵌入
-》想要嵌入，则需要用：
-vf ass=subtitles.ass
但是此处没有ass的filter
-》需要去想办法给ffmpeg添加enable-libass
自己去编译？
➜ ffmpeg_edit_subtitle brew info ffmpeg ffmpeg: stable 3.4.2 (bottled), HEAD Play, record, convert, and stream audio and video https://ffmpeg.org/ /usr/local/Cellar/ffmpeg/3.4.2 (248 files, 50.9MB) * Poured from bottle on 2018-04-17 at 10:51:58 From: https://mirrors.ustc.edu.cn/homebrew-core.git/Formula/ffmpeg.rb ==> Dependencies Build: nasm ✘, pkg-config ✔, texi2html ✘ Recommended: lame ✔, x264 ✔, xvid ✔ Optional: chromaprint ✘, fdk-aac ✘, fontconfig ✘, freetype ✘, frei0r ✘, game-music-emu ✘, libass ✘, libbluray ✘, libbs2b ✘, libcaca ✘, libgsm ✘, libmodplug ✘, librsvg ✘, libsoxr ✘, libssh ✘, libvidstab ✘, libvorbis ✘, libvpx ✘, opencore-amr ✘, openh264 ✘, openjpeg ✘, openssl ✔, opus ✘, rtmpdump ✘, rubberband ✘, sdl2 ✘, snappy ✘, speex ✘, tesseract ✘, theora ✘, two-lame ✘, wavpack ✘, webp ✘, x265 ✘, xz ✔, zeromq ✘, zimg ✘ ==> Options --with-chromaprint Enable the Chromaprint audio fingerprinting library --with-fdk-aac Enable the Fraunhofer FDK AAC library --with-fontconfig Build with fontconfig support --with-freetype Build with freetype support --with-frei0r Build with frei0r support --with-game-music-emu Build with game-music-emu support --with-libass Enable ASS/SSA subtitle format --with-libbluray Build with libbluray support --with-libbs2b Build with libbs2b support --with-libcaca Build with libcaca support --with-libgsm Build with libgsm support --with-libmodplug Build with libmodplug support --with-librsvg Enable SVG files as inputs via librsvg --with-libsoxr Enable the soxr resample library --with-libssh Enable SFTP protocol via libssh --with-libvidstab Enable vid.stab support for video stabilization --with-libvorbis Build with libvorbis support --with-libvpx Build with libvpx support --with-opencore-amr Enable Opencore AMR NR/WB audio format --with-openh264 Enable OpenH264 library --with-openjpeg Enable JPEG 2000 image format --with-openssl Enable SSL support --with-opus Build with opus support --with-rtmpdump Enable RTMP protocol --with-rubberband Enable rubberband library --with-sdl2 Enable FFplay media player --with-snappy Enable Snappy library --with-speex Build with speex support --with-tesseract Enable the tesseract OCR engine --with-theora Build with theora support --with-tools Enable additional FFmpeg tools --with-two-lame Build with two-lame support --with-wavpack Build with wavpack support --with-webp Enable using libwebp to encode WEBP images --with-x265 Enable x265 encoder --with-xz Enable decoding of LZMA-compressed TIFF files --with-zeromq Enable using libzeromq to receive commands sent through a libzeromq client --with-zimg Enable z.lib zimg library --without-gpl Disable building GPL licensed parts of FFmpeg --without-lame Disable MP3 encoder --without-qtkit Disable deprecated QuickTime framework --without-securetransport Disable use of SecureTransport --without-x264 Disable H.264 encoder --without-xvid Disable Xvid MPEG-4 video encoder --HEAD Install HEAD version
所以此处是：
libass，没有开启。
去参考示例，开启：
brew install ffmpeg \ --with-tools \ --with-fdk-aac \ --with-freetype \ --with-fontconfig \ --with-libass \ --with-libvorbis \ --with-libvpx \ --with-opus \ --with-x265
结果提示：
➜ ffmpeg_edit_subtitle brew install ffmpeg \ --with-tools \ --with-fdk-aac \ --with-freetype \ --with-fontconfig \ --with-libass \ --with-libvorbis \ --with-libvpx \ --with-opus \ --with-x265 Updating Homebrew... Warning: ffmpeg 3.4.2 is already installed and up-to-date To reinstall 3.4.2, run `brew reinstall ffmpeg
需要重新安装ffmpeg。
那就重新安装，加上那些参数，结果：
【已解决】Mac中brew reinstall ffmpeg出错：Error: Calling keg_only :provided_pre_mountain_lion is disabled! There is no replacement
然后就支持了ass。
转载请注明：在路上 » 【已解决】Mac中尝试给mp4内嵌字幕出错：AVFilterGraph No such filter ass