video - ffmpeg concat 垂直视频,不同尺寸
问题描述
上下文:3 个输入视频:
foo.mov
:1080x1920(垂直,非水平)带音频。
bar.mp4
和fiz.mp4
:480x360,带音频。(注:.mp4
,不同于.mov
)
目标:连接所有 3 个视频。输出out.mp4
应为 480x360。挤压foo.mov
但保持其纵横比,占据 100% 的高度,但纤细的视频应仅位于中间,左右两侧为黑色(或其他颜色)空白。foo.mov
不应裁剪。
我目前在下面有这个命令(为更好的可视化添加了换行符)用于连接,但需要在PLACEHOLDER1
generate 处填充缺失的代码,以便v0
将v0
其大小调整为 480x360,如上所述。如果到目前为止我的尝试是正确的,请帮助完成PLACEHOLDER1
;否则,请提供更好的解决方案和解释。
ffmpeg
-r 24 -i foo.mov
-r 24 -i bar.mp4
-r 24 -i fiz.mp4
-filter_complex
"[0:v] PLACEHOLDER1 [v0];
[v0][1][2] concat=n=3:v=1:a=1 [v][a]"
-map "[v]" -map "[a]" out.mp4
跑步
ffmpeg -n -i foo.MOV -i bar.mp4 -i fiz.mp4
给出这个信息:
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 11.0.3 (clang-1103.0.32.62)
[...configuration omitted...]
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 'foo.MOV':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : [omitted]
com.apple.quicktime.make: [omitted]
com.apple.quicktime.model: [omitted]
com.apple.quicktime.software: [omitted]
com.apple.quicktime.creationdate: [omitted]
Duration: 00:00:04.71, start: 0.000000, bitrate: 17579 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 17492 kb/s, 24 fps, 24 tbr, 600 tbn, 1200 tbc (default)
Metadata:
rotate : 90
creation_time : [omitted]
handler_name : Core Media Video
encoder : H.264
Side data:
displaymatrix: rotation of -90.00 degrees
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 63 kb/s (default)
Metadata:
creation_time : [omitted]
handler_name : Core Media Audio
Stream #0:2(und): Data: none (mebx / 0x7862656D), 9 kb/s (default)
Metadata:
creation_time : [omitted]
handler_name : Core Media Metadata
Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : [omitted]
handler_name : Core Media Metadata
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'bar.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:00:01.94, start: 0.000000, bitrate: 641 kb/s
Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 480x360 [SAR 1:1 DAR 4:3], 354 kb/s, 24.58 fps, 24.58 tbr, 113734695.00 tbn, 49.16 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 280 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from 'fiz.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:00:01.98, start: 0.000000, bitrate: 725 kb/s
Stream #2:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/smpte170m), 480x360 [SAR 1:1 DAR 4:3], 442 kb/s, 24.58 fps, 24.58 tbr, 113734695.00 tbn, 49.16 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #2:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 278 kb/s (default)
Metadata:
handler_name : SoundHandler
解决方案
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