问题描述
当我只是尝试从ffmpeg-python页面进行简单演示时，就会出现此错误：
import ffmpeg
stream = ffmpeg.input('human_face.mp4')
stream = ffmpeg.hflip(stream)
stream = ffmpeg.output(stream,'new_human_face.mp4')
ffmpeg.run(stream)
输出如下：
...
Input #0,mov,mp4,m4a,3gp,3g2,mj2,from 'human_face.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf58.49.100
Duration: 00:00:12.45,start: 0.000000,bitrate: 742 kb/s
Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D),none,256x256,741 kb/s,20 fps,20 tbr,10240 tbn,10240 tbc (default)
Metadata:
handler_name : VideoHandler
Automatic encoder selection failed for output stream #0:0. Default encoder for format mp4 (codec mpeg4) is probably disabled or this build of ffmpeg does not include that codec. Please choose an encoder manually.
Error selecting an encoder for stream 0:0
Traceback (most recent call last):
File "<stdin>",line 1,in <module>
File "/home/tristan_jia/workspace/py3.6/venv/lib/python3.6/site-packages/ffmpeg/_run.py",line 325,in run
raise Error('ffmpeg',out,err)
我认为最重要的日志是：“ 输出流＃0：0的自动编码器选择失败。格式mp4（编解码器mpeg4）的默认编码器可能已禁用，或者此ffmpeg版本不包含该编解码器。请手动选择编码器。“
我已经重新安装了ffmpeg软件包，但错误仍然存在。
附录1： 感谢@HernánAlarcón的评论：
- 版本为3.4.4。
-
ffmpeg -encoders的输出是：
(venv) tristan_jia@linux-ftbv:~/.../data> ffmpeg -encoders
ffmpeg version 3.4.4 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7 (SUSE Linux)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g' --optflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-libcdio --enable-gnutls --enable-ladspa --disable-cuda --disable-cuvid --enable-libass --enable-libbluray --enable-libcelt --enable-libcdio --enable-libdc1394 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libzimg --enable-libzvbi --enable-vaapi --enable-vdpau --enable-muxers --enable-demuxers --disable-encoders --disable-decoders --disable-decoder='mpeg4,h263,h264,hevc,vc1' --enable-encoder='apng,ass,ayuv,bmp,ffv1,ffvhuff,flac,gif,huffyuv,jpegls,libgsm,libmp3lame,libopenjpeg,libopus,libschroedinger,libspeex,libtheora,libtwolame,libvorbis,libvpx_vp8,libvpx_vp9,libwebp,libwebp_anim,mjpeg,mp2,mp2fixed,opus,pam,pbm,pcm_alaw,pcm_f32be,pcm_f32le,pcm_f64be,pcm_f64le,pcm_mulaw,pcm_s16be,pcm_s16be_planar,pcm_s16le,pcm_s16le_planar,pcm_s24be,pcm_s24le,pcm_s24le_planar,pcm_s32be,pcm_s32le,pcm_s32le_planar,pcm_s8,pcm_s8_planar,pcm_u16be,pcm_u16le,pcm_u24be,pcm_u24le,pcm_u32be,pcm_u32le,pcm_u8,pcx,pgm,pgmyuv,png,ppm,sgi,srt,ssa,sunrast,targa,text,tiff,v210,v308,v408,v410,vorbis,xbm,xwd,y41p,yuv4,zlib,' --enable-decoder='ac3,ansi,apng,dirac,exr,ffwavesynth,gsm,libcelt,mpeg1video,mpeg2video,mp1,mp1float,mp2float,mp3,mp3float,pcm_bluray,pcm_dvd,pgssub,rawvideo,theora,v210x,vp3,vp5,vp6,vp6a,vp6f,vp8,vp9,webp,'
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
Encoders:
V..... = Video
A..... = Audio
S..... = Subtitle
.F.... = Frame-level multithreading
..S... = Slice-level multithreading
...X.. = Codec is experimental
....B. = Supports draw_horiz_band
.....D = Supports direct rendering method 1
------
V..... apng APNG (Animated Portable Network Graphics) image
V..... ayuv Uncompressed packed MS 4:4:4:4
V..... bmp BMP (Windows and OS/2 bitmap)
V.S... ffv1 FFmpeg video codec #1
VF.... ffvhuff Huffyuv FFmpeg variant
V..... gif GIF (Graphics Interchange Format)
VF.... huffyuv Huffyuv / HuffYUV
VF.... libopenjpeg OpenJPEG JPEG 2000 (codec jpeg2000)
VF.... jpegls JPEG-LS
VFS... mjpeg MJPEG (Motion JPEG)
V..... pam PAM (Portable AnyMap) image
V..... pbm PBM (Portable BitMap) image
V..... pcx PC Paintbrush PCX image
V..... pgm PGM (Portable GrayMap) image
V..... pgmyuv PGMYUV (Portable GrayMap YUV) image
VF.... png PNG (Portable Network Graphics) image
V..... ppm PPM (Portable PixelMap) image
V..... sgi SGI image
V..... sunrast Sun Rasterfile image
V..... targa Truevision Targa image
V..... libtheora libtheora Theora (codec theora)
VF.... tiff TIFF image
V..... v210 Uncompressed 4:2:2 10-bit
V..... v308 Uncompressed packed 4:4:4
V..... v408 Uncompressed packed QT 4:4:4:4
V..... v410 Uncompressed 4:4:4 10-bit
V..... libvpx libvpx VP8 (codec vp8)
V..... libvpx-vp9 libvpx VP9 (codec vp9)
V..... libwebp_anim libwebp WebP image (codec webp)
V..... libwebp libwebp WebP image (codec webp)
V..... xbm XBM (X BitMap) image
V..... xwd XWD (X Window Dump) image
V..... y41p Uncompressed YUV 4:1:1 12-bit
V..... yuv4 Uncompressed packed 4:2:0
VF.... zlib LCL (LossLess Codec Library) ZLIB
A..... flac FLAC (Free Lossless Audio Codec)
A..... libgsm libgsm GSM (codec gsm)
A..... mp2 MP2 (MPEG audio layer 2)
A..... mp2fixed MP2 fixed point (MPEG audio layer 2) (codec mp2)
A..... libtwolame libtwolame MP2 (MPEG audio layer 2) (codec mp2)
A..... libmp3lame libmp3lame MP3 (MPEG audio layer 3) (codec mp3)
A..X.. opus Opus
A..... libopus libopus Opus (codec opus)
A..... pcm_alaw PCM A-law / G.711 A-law
A..... pcm_f32be PCM 32-bit floating point big-endian
A..... pcm_f32le PCM 32-bit floating point little-endian
A..... pcm_f64be PCM 64-bit floating point big-endian
A..... pcm_f64le PCM 64-bit floating point little-endian
A..... pcm_mulaw PCM mu-law / G.711 mu-law
A..... pcm_s16be PCM signed 16-bit big-endian
A..... pcm_s16be_planar PCM signed 16-bit big-endian planar
A..... pcm_s16le PCM signed 16-bit little-endian
A..... pcm_s16le_planar PCM signed 16-bit little-endian planar
A..... pcm_s24be PCM signed 24-bit big-endian
A..... pcm_s24le PCM signed 24-bit little-endian
A..... pcm_s24le_planar PCM signed 24-bit little-endian planar
A..... pcm_s32be PCM signed 32-bit big-endian
A..... pcm_s32le PCM signed 32-bit little-endian
A..... pcm_s32le_planar PCM signed 32-bit little-endian planar
A..... pcm_s8 PCM signed 8-bit
A..... pcm_s8_planar PCM signed 8-bit planar
A..... pcm_u16be PCM unsigned 16-bit big-endian
A..... pcm_u16le PCM unsigned 16-bit little-endian
A..... pcm_u24be PCM unsigned 24-bit big-endian
A..... pcm_u24le PCM unsigned 24-bit little-endian
A..... pcm_u32be PCM unsigned 32-bit big-endian
A..... pcm_u32le PCM unsigned 32-bit little-endian
A..... pcm_u8 PCM unsigned 8-bit
A..... libspeex libspeex Speex (codec speex)
A..X.. vorbis Vorbis
A..... libvorbis libvorbis (codec vorbis)
S..... ssa ASS (Advanced SubStation Alpha) subtitle (codec ass)
S..... ass ASS (Advanced SubStation Alpha) subtitle
S..... srt SubRip subtitle (codec subrip)
S..... text Raw text subtitle
'''
解决方法
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