我正在寻求帮助以在 OSX 上自动化 FFMPEG 工作流程。
我想要一个热文件夹，当我放下 .mp4 时，它会开始合并。它会在前面添加一张卡片，在后面添加一张卡片。前面的卡片与后面的卡片相同（但正面和背面不同）。
我曾使用过类似的东西成功输出 .mkv，但我不知道如何输出 .mp4
ffmpeg -i front.mp4 -i main.mp4 -i end.mp4 \
-filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0][2:v:0]2:a:0]concat=n=3:v=1:a=1[outv][outa]" \
-map "[outv]" -map "[outa]" output.mkv
LLogan 的结果日志
ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 11.0.3 (clang-1103.0.32.62)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/Mark/FFMPEG/CARD/start.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:00:07.50, start: 0.000000, bitrate: 1737 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1605 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/Mark/FFMPEG/RAW/body.mp4':
Metadata:
major_brand : mp42
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 2020-04-12T01:12:58.000000Z
encoder : HandBrake 1.2.0 2018122200
Duration: 00:43:51.96, start: 0.000000, bitrate: 2405 kb/s
Stream #1:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 2264 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2020-04-12T01:12:58.000000Z
handler_name : VideoHandler
Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 132 kb/s (default)
Metadata:
creation_time : 2020-04-12T01:12:58.000000Z
handler_name : SoundHandler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/Mark/FFMPEG/CARD/end.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: isommp41mp42
creation_time : 2020-06-09T19:53:13.000000Z
Duration: 00:00:28.00, start: 0.000000, bitrate: 2584 kb/s
Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 2479 kb/s, 23.96 fps, 23.98 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2020-06-09T19:53:13.000000Z
handler_name : Core Media Video
Stream #2:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
Metadata:
creation_time : 2020-06-09T19:53:13.000000Z
handler_name : Core Media Audio
At least one output file must be specified
答案1
我很难在单个命令行中“合并”MP4。但是，这种方法对我来说绝对有效。将其放入 shell 脚本中，例如merge.sh：
if [ $# -lt 2 ]
then
printf "USAGE: $0 <mp4-files>\n"
exit
fi
if [ -f merge.txt ]
then
rm merge.txt
fi
for file in "$@"
do
if [ -f "$file" ]
then
echo "file '"`pwd`/"$file'" >> merge.txt
fi
done
basename=`echo $1 | sed -e 's/\(.*\)\.[^.]*$/\1/'`
ffmpeg -f concat -safe 0 -i merge.txt -c copy "$basename.merged.mp4"