如何解决从andriod手机录制的视频的ffmpeg视频合并问题
以下是我正在使用的命令：
sudo ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "[1]tpad=start_mode=clone:start_duration=15[tr];[0][tr]xstack=inputs=2:layout=0_0|w0_0[v];[1:a]adelay=15s:all=true[a1];[0:a][a1]amix=inputs=2[a]" -map "[v]" -map "[a]" output.mp4
合并视频花了几个小时。原始视频大小为 6 MB。合并的视频大小约为 2 GB。
从 iphone 录制的视频工作正常。
更新： 问题在于不同视频中的不同 fps。如果两个视频的 fps 不同，则时间太长，最终会中断。
完整日志：
ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "[1]tpad=start_mode=clone:start_duration=15[tr];[0][tr]xstack=inputs=2:layout=0_0|w0_0[v];[1:a]adelay=15s:all=true[a1];[0:a][a1]amix=inputs=2[a]" -map "[v]" -map "[a]" output_ia_2.mp4
ffmpeg version 4.3.2-0york0~16.04 copyright (c) 2000-2021 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
configuration: --prefix=/usr --extra-version='0york0~16.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libzimg --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
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 '97FD4344-23C3-4668-AA40-E5E724338352-3149-0000018389D9630F.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2021-04-09T00:43:28.000000Z
Duration: 00:00:15.03,start: 0.000000,bitrate: 10342 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D),44100 Hz,mono,fltp,226 kb/s (default)
Metadata:
creation_time : 2021-04-09T00:43:28.000000Z
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661),yuvj420p(pc,bt709),720x1280,10111 kb/s,30 fps,30 tbr,600 tbn,1200 tbc (default)
Metadata:
creation_time : 2021-04-09T00:43:28.000000Z
handler_name : Core Media Video
encoder : H.264
Input #1,from 'android_ritesh.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2021-04-13T06:39:16.000000Z
com.android.version: 10
Duration: 00:00:09.59,bitrate: 5288 kb/s
Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661),yuv420p(tv,unkNown/bt470bg/unkNown),5152 kb/s,SAR 1:1 DAR 9:16,17.31 fps,59.94 tbr,90k tbn,180k tbc (default)
Metadata:
creation_time : 2021-04-13T06:39:16.000000Z
handler_name : VideoHandle
Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D),48000 Hz,stereo,131 kb/s (default)
Metadata:
creation_time : 2021-04-13T06:39:16.000000Z
handler_name : SoundHandle
Stream mapping:
Stream #0:0 (aac) -> amix:input0
Stream #0:1 (h264) -> xstack:input0
Stream #1:0 (h264) -> tpad
Stream #1:1 (aac) -> adelay
xstack -> Stream #0:0 (libx264)
amix -> Stream #0:1 (aac)
Press [q] to stop,[?] for help
[swscaler @ 0x5628692bd340] deprecated pixel format used,make sure you did set range correctly
[mp4 @ 0x562868aa7dc0] Frame rate very high for a muxer not efficiently supporting it.
Please consider specifying a lower framerate,a different muxer or -vsync 2
[libx264 @ 0x562868af2400] MB rate (648000000) > level limit (16711680)
[libx264 @ 0x562868af2400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x562868af2400] profile High,level 6.2
[libx264 @ 0x562868af2400] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0,to 'output_ia_2.mp4':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
encoder : Lavf58.45.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661),progressive),1440x1280,q=-1--1,90k tbc (default)
Metadata:
encoder : Lavc58.91.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D),69 kb/s (default)
Metadata:
encoder : Lavc58.91.100 aac
More than 1000 frames duplicated 0kB time=00:00:00.00 bitrate=N/A speed= 0x
More than 10000 frames duplicated 4352kB time=00:00:00.09 bitrate=358592.3kbits/s dup=8991 drop=0 speed=0.00141x
frame=15000 fps=131 q=33.0 size= 7680kB time=00:00:00.16 bitrate=378802.6kbits/s dup=14985 drop=0 speed=0.00145x
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