我在 MacOs 10.15.7 上使用 ffmpeg 将 jpeg 在特定时间戳连接在一起，使用权限设置为 755 的 txt 文件（内容如下）
file 'Walk1_pupil_00001_00.jpeg'
inpoint 00:00:00.862054
outpoint 00:00:01.722921
file 'Walk1_pupil_00002_00.jpeg'
inpoint 00:00:01.722922
outpoint 00:00:01.747019
file 'Walk1_pupil_00003_00.jpeg'
inpoint 00:00:01.747020
outpoint 00:00:01.748162
file 'Walk1_pupil_00003_00.jpeg'
我在与我在 txt 文件内调用的图像相同的文件夹中运行了以下命令（该文件也在同一个文件夹中）：
ffmpeg -f concat -safe 0 -i myra_test.txt -loglevel debug 1088x1080 -vcodec libx264 -pix_fmt yuv420p -metadata date=2021-04-27T19:27:05.000000Z /Users/mairahmac/Dropbox/My\ Mac\ \(Myras-MacBook-Pro.local\)/Desktop/Rotations/NanthiaSuthana/SpatialNavigationTask/subWalkVideoData/Walk1/VideoOut/myra_test.mp4
会产生以下错误：
ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Splitting the commandline.
Reading option '-f' ... matched as option 'f' (force format) with argument 'concat'.
Reading option '-safe' ... matched as AVOption 'safe' with argument '0'.
Reading option '-i' ... matched as input url with argument 'myra_test.txt'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '1088x1080' ... matched as output url.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'libx264'.
Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) with argument 'yuv420p'.
Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'date=2021-04-27T19:27:05.000000Z'.
Reading option '/Users/mairahmac/Dropbox/My Mac (Myras-MacBook-Pro.local)/Desktop/Rotations/NanthiaSuthana/SpatialNavigationTask/subWalkVideoData/Walk1/VideoOut/myra_test.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url myra_test.txt.
Applying option f (force format) with argument concat.
Successfully parsed a group of options.
Opening an input file: myra_test.txt.
[concat @ 0x7f8e8a809800] Opening 'myra_test.txt' for reading
[file @ 0x7f8e895236c0] Setting default whitelist 'file,crypto,data'
[NULL @ 0x7f8e8a80a400] Opening 'Walk1_pupil_00001_00.jpeg' for reading
[image2 @ 0x7f8e8a80a400] Format image2 probed with size=2048 and score=50
[image2 @ 0x7f8e8a80a400] Before avformat_find_stream_info() pos: 0 bytes read:19125 seeks:0 nb_streams:1
[mjpeg @ 0x7f8e89814200] marker=d8 avail_size_in_buf=19123
[mjpeg @ 0x7f8e89814200] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x7f8e89814200] marker=e0 avail_size_in_buf=19121
[mjpeg @ 0x7f8e89814200] marker parser used 16 bytes (128 bits)
[mjpeg @ 0x7f8e89814200] marker=db avail_size_in_buf=19103
[mjpeg @ 0x7f8e89814200] index=0
[mjpeg @ 0x7f8e89814200] qscale[0]: 0
[mjpeg @ 0x7f8e89814200] marker parser used 67 bytes (536 bits)
[mjpeg @ 0x7f8e89814200] marker=db avail_size_in_buf=19034
[mjpeg @ 0x7f8e89814200] index=1
[mjpeg @ 0x7f8e89814200] qscale[1]: 1
[mjpeg @ 0x7f8e89814200] marker parser used 67 bytes (536 bits)
[mjpeg @ 0x7f8e89814200] marker=c0 avail_size_in_buf=18965
[mjpeg @ 0x7f8e89814200] Changing bps from 0 to 8
[mjpeg @ 0x7f8e89814200] sof0: picture: 1088x1080
[mjpeg @ 0x7f8e89814200] component 0 2:2 id: 0 quant:0
[mjpeg @ 0x7f8e89814200] component 1 1:1 id: 1 quant:1
[mjpeg @ 0x7f8e89814200] component 2 1:1 id: 2 quant:1
[mjpeg @ 0x7f8e89814200] pix fmt id 22111100
[mjpeg @ 0x7f8e89814200] Format yuvj420p chosen by get_format().
[mjpeg @ 0x7f8e89814200] marker parser used 17 bytes (136 bits)
[mjpeg @ 0x7f8e89814200] marker=c4 avail_size_in_buf=18946
[mjpeg @ 0x7f8e89814200] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x7f8e89814200] marker=c4 avail_size_in_buf=18913
[mjpeg @ 0x7f8e89814200] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x7f8e89814200] marker=c4 avail_size_in_buf=18730
[mjpeg @ 0x7f8e89814200] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x7f8e89814200] marker=c4 avail_size_in_buf=18697
[mjpeg @ 0x7f8e89814200] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x7f8e89814200] escaping removed 1 bytes
[mjpeg @ 0x7f8e89814200] marker=da avail_size_in_buf=18514
[mjpeg @ 0x7f8e89814200] marker parser used 18513 bytes (148104 bits)
[mjpeg @ 0x7f8e89814200] EOI missing, emulating
[mjpeg @ 0x7f8e89814200] decode frame unused 0 bytes
[image2 @ 0x7f8e8a80a400] After avformat_find_stream_info() pos: 19125 bytes read:19125 seeks:0 frames:1
[AVIOContext @ 0x7f8e89411440] Statistics: 19125 bytes read, 0 seeks
[AVIOContext @ 0x7f8e89523880] Statistics: 278 bytes read, 0 seeks
myra_test.txt: Operation not permitted
我使用 jpeginfo 检查了所有 jpeg 文件，看它们是否已损坏，结果一切正常。有人能帮我吗？