Python ffmpeg的子进程调用返回负值
以下是在shell上工作的原始命令行调用：Python ffmpeg的子进程调用返回负值,python,ffmpeg,Python,Ffmpeg,以下是在shell上工作的原始命令行调用： ffmpeg -i /Users/abc/Desktop/Test/Full_Mov.mov -vf "drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: fontsize=20: box=1: boxcol
ffmpeg -i /Users/abc/Desktop/Test/Full_Mov.mov -vf "drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=white: fontsize=20: box=1: boxcolor=black: boxborderw=5","format=yuv420p" -f segment -segment_frames 123 -reset_timestamps 1 -c:a copy -map 0 "/Users/abc/Desktop/Test/%03d_test40.mov"
import subprocess
ffmpeg = "/usr/local/bin/ffmpeg"
source = "/Users/abc/Desktop/Test/Full_Mov.mov"
destination = "/Users/abc/Desktop/Test/%03d_test40.mov"
cmd = "%s -i %s -vf \"drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %%{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5\",\"format=yuv420p\" -f segment -segment_frames 123 -reset_timestamps 1 -c:a copy -map 0 \"%s\"" % (ffmpeg, source, destination)
log("ffmpeg cmd: %s" % cmd)
log(subprocess.check_output(cmd, shell=True))
CalledProcessError: Command '/usr/local/bin/ffmpeg -i /Users/abc/Desktop/Full_Mov.mov -vf "drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf: text='SCENE BLAH BLAH - %{frame_num}': start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5","format=yuv420p" -f segment -segment_frames 318 -reset_timestamps 1 -c:a copy -map 0 "/Users/abc/Desktop/Test/%03d.tmp.mov"' returned non-zero exit status -8
raise CalledProcessError(retcode, cmd, output=output)
CalledProcessError: Command '/usr/local/bin/ffmpeg' returned non-zero exit status 1
raise CalledProcessError(retcode, cmd, output=output)
subprocess.CalledProcessError: Command '['/usr/local/bin/ffmpeg', '-i', '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov', '-vf', 'drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf:', 'text=SCENE BLAH BLAH - %%{frame_num}:', 'start_number=1:', 'x=(w-tw)/2:', 'y=h-(2*lh):', 'fontcolor=black:', 'fontsize=20:', 'box=1:', 'boxcolor=white:', 'boxborderw=5', 'format=yuv420p', '-f', 'segment', '-segment_frames', '123', '-reset_timestamps', '1', '-c:a', 'copy', '-map', '0', '/Users/szaharak/Desktop/Flix_Test/%03d_test40.mov']' returned non-zero exit status 1
[NULL @ 0x7f88c3012200] Unable to find a suitable output format for 'text=SCENE BLAH BLAH - %%{frame_num}:'
text=SCENE BLAH BLAH - %%{frame_num}:: Invalid argument
>>> rc = subprocess.check_call(cmd)
ffmpeg version N-93891-ge1839283bc-tessus https://evermeet.cx/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
libavutil 56. 28.100 / 56. 28.100
libavcodec 58. 52.102 / 58. 52.102
libavformat 58. 27.103 / 58. 27.103
libavdevice 58. 7.100 / 58. 7.100
libavfilter 7. 53.101 / 7. 53.101
libswscale 5. 4.101 / 5. 4.101
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2019-05-14T17:58:24.000000Z
com.apple.quicktime.player.movie.audio.gain: 1.000000
com.apple.quicktime.player.movie.audio.treble: 0.000000
com.apple.quicktime.player.movie.audio.bass: 0.000000
com.apple.quicktime.player.movie.audio.balance: 0.000000
com.apple.quicktime.player.movie.audio.pitchshift: 0.000000
com.apple.quicktime.player.movie.audio.mute:
com.apple.quicktime.player.movie.visual.brightness: 0.000000
com.apple.quicktime.player.movie.visual.color: 1.000000
com.apple.quicktime.player.movie.visual.tint: 0.000000
com.apple.quicktime.player.movie.visual.contrast: 1.000000
com.apple.quicktime.player.version: 7.6.6 (7.6.6)
com.apple.quicktime.version: 7.7.3 (2943.14) 0x7738000 (Mac OS X, 10.11.6, 15G22010)
Duration: 00:01:12.67, start: 0.000000, bitrate: 23379 kb/s
Stream #0:0(eng): Video: mjpeg (Baseline) (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720 [SAR 72:72 DAR 16:9], 21838 kb/s, 24 fps, 24 tbr, 24k tbn, 24k tbc (default)
Metadata:
creation_time : 2019-05-14T17:58:24.000000Z
handler_name : Apple Video Media Handler
encoder : Photo - JPEG
Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2019-05-14T17:58:24.000000Z
handler_name : Apple Sound Media Handler
[NULL @ 0x7f8ddc8ce200] Unable to find a suitable output format for 'text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p'
text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p: Invalid argument
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 190, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/usr/local/bin/ffmpeg', '-i', '/Users/szaharak/Desktop/Flix_Test/ep888_sq66_main_mov_2019_05_20_14_15.mov', '-vf', 'drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf:', 'text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p', '-f', 'segment', '-segment_frames', '123', '-reset_timestamps', '1', '-c:a', 'copy', '-map', '0', '/Users/szaharak/Desktop/Flix_Test/%03d_test40.mov']' returned non-zero exit status 1
ffmpeg检查输出。你真的不需要这样做，如果程序失败，你将没有任何输出
我会尝试以下方法（我无法测试），即：
- drop
shell=True
- 传递参数列表，而不是自己编写字符串。它允许忘记引用/转义。您不需要格式化命令、源和目标，因为它们是独立的参数：
- 不记录，只需打印
检查\u call
。
作为奖励，您将实时获得输出，而不是最终
请注意，我已经删除了“text=SCENE BLAH-BLAH-%{frame_num}:，
中的单引号，并取消了%
字符的scape
像这样：
cmd = [ffmpeg,"-i",source,"-vf",
"drawtext=fontfile=/System/Library/Fonts/Keyboard.ttf:",
"text=SCENE BLAH BLAH - %{frame_num}: start_number=1: x=(w-tw)/2: y=h-(2*lh): fontcolor=black: fontsize=20: box=1: boxcolor=white: boxborderw=5: format=yuv420p",
"-f","segment","-segment_frames","123",
"-reset_timestamps","1","-c:a","copy","-map","0",destination]
log("ffmpeg cmd: %s" % cmd)
rc = subprocess.check_call(cmd)
if rc:
raise Exception("ffmpeg failed")
对于ffmpeg
的情况，您可以迁移到。这样也可以避免一些参数解析的麻烦。您应该尝试使用check\u call
查看输出是什么。check\u output