获取ffmpeg转码的实时进度

Zeranoe FFmpeg Builds <http://ffmpeg.zeranoe.com/builds/> Build: ffmpeg-4.3.1-win32-shared Configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf Libraries: SDL 20200724-a8f8265 <https://libsdl.org> Fontconfig 2.13.92 <http://freedesktop.org/wiki/Software/fontconfig> GnuTLS 3.6.14 <https://gnutls.org/> libiconv 1.16 <http://gnu.org/software/libiconv> libass 20200714-66dba8d <https://github.com/libass/libass> dav1d 20200720-6cf58c8 <https://code.videolan.org/videolan/dav1d> libbluray 20200723-76b073b <https://www.videolan.org/developers/libbluray.html> FreeType 2.10.2 <http://freetype.sourceforge.net> LAME 3.100 <http://lame.sourceforge.net> OpenCORE AMR 20170731-07a5be4 <https://sourceforge.net/projects/opencore-amr> OpenJPEG 20200630-cbee789 <https://github.com/uclouvain/openjpeg> Opus 20200707-484af25 <https://opus-codec.org> shine 20190420-76ea4f0 <https://github.com/savonet/shine> Snappy 1.1.8 <https://github.com/google/snappy> libsoxr 20180224-945b592 <http://sourceforge.net/projects/soxr> SRT 1.4.1 <https://www.srtalliance.org> Theora 20200618-f98989a <http://theora.org> TwoLAME 0.4.0 <http://twolame.org> vpx 20200723-dbe00bb <http://webmproject.org> WavPack 5.3.0 <http://wavpack.com> WebP 20200505-e3c259a <https://developers.google.com/speed/webp> x264 20200714-db0d417 <https://www.videolan.org/developers/x264.html> x265 20200529-73ca1d7 <https://bitbucket.org/multicoreware/x265/wiki/Home> libxml2 2.9.10 <http://xmlsoft.org> z.lib 20200716-ecc9d07 <https://github.com/sekrit-twc/zimg> XZ Utils 5.2.5 <http://tukaani.org/xz> zlib 1.2.11 <http://zlib.net> GMP 6.2.0 <https://gmplib.org> vid.stab 20190213-aeabc8d <http://public.hronopik.de/vid.stab> VMAF 20200725-4fb36ef <https://github.com/Netflix/vmaf> Vorbis 20200720-4a767c9 <http://vorbis.com> VisualOn AMR-WB 20141107-3b3fcd0 <https://sourceforge.net/projects/opencore-amr> libmysofa 20200710-6f4f25e <https://github.com/hoene/libmysofa> Speex 20200716-870ff84 <http://speex.org> Xvid 1.3.7 <https://labs.xvid.com> aom 20200804-0c0d971 <https://aomedia.googlesource.com/aom> GSM 1.0.19 <http://quut.com/gsm/> libmfx 1.28 <https://software.intel.com/en-us/media-sdk> nv-codec-headers 20200701-de0b1bf <https://git.videolan.org/?p=ffmpeg/nv-codec-headers.git> AviSynth+ 20200619-1eb7ce6 <https://github.com/AviSynth/AviSynthPlus> OpenMPT 20200726-5de00f4 <https://openmpt.org> AMF 20200515-802f92e <https://gpuopen.com/gaming-product/advanced-media-framework> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.