FFMpeg Concat 필터 - 파일의 시작 위치 설정

Question

concat 필터를 사용하여 두 개의 비디오 파일을 연결하려고합니다. 첫 번째 파일은 완전히 포함되어야하지만 두 번째 비디오는 10 초부터 포함되어야합니다. 10 번째 초부터 중간 파일을 먼저 만들어야합니까, 아니면 한 번에 할 수 있습니까?

내가 사용하고 명령은

/usr/local/bin/ffmpeg -i intro.mp4 -i input.mp4 -filter_complex '[0:v] scale=720:576 [in1]; [1:v] scale=720:576 [in2]; [in1][in2] concat [v]; [0:a][1:a] concat=v=0:a=1 [a]' -map '[v]' -map '[a]' output.mp4 

내가 -i input.mp4 후 -ss을 지정하는 시도이지만, 최종 출력 파일에 적용됩니다.

iMac:files joyce$ /usr/local/bin/ffmpeg -i intro.mp4 -i input.mp4 -filter_complex '[0:v] scale=720:576 [in1]; [1:v] scale=720:576 [in2]; [in1][in2] concat [v]; [0:a][1:a] concat=v=0:a=1 [a]' -map '[v]' -map '[a]' output.mp4 
ffmpeg version 2.1.4 Copyright (c) 2000-2014 the FFmpeg developers 
    built on Mar 22 2014 16:19:43 with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn) 
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.1.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libfdk-aac 
    libavutil  52. 48.101/52. 48.101 
    libavcodec  55. 39.101/55. 39.101 
    libavformat 55. 19.104/55. 19.104 
    libavdevice 55. 5.100/55. 5.100 
    libavfilter  3. 90.100/3. 90.100 
    libavresample 1. 1. 0/1. 1. 0 
    libswscale  2. 5.101/2. 5.101 
    libswresample 0. 17.104/0. 17.104 
    libpostproc 52. 3.100/52. 3.100 
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'intro.mp4': 
    Metadata: 
    major_brand  : isom 
    minor_version : 512 
    compatible_brands: isomiso2avc1mp41 
    encoder   : Lavf55.19.104 
    Duration: 00:00:03.05, start: 0.046440, bitrate: 1304 kb/s 
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1/0x31637661), yuv420p, 1920x1080, 1167 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default) 
    Metadata: 
     handler_name : VideoHandler 
    Stream #0:1(und): Audio: aac (mp4a/0x6134706D), 44100 Hz, stereo, fltp, 132 kb/s (default) 
    Metadata: 
     handler_name : SoundHandler 
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4': 
    Metadata: 
    major_brand  : isom 
    minor_version : 512 
    compatible_brands: isomiso2avc1mp41 
    encoder   : Lavf55.19.104 
    episode_sort : 1 
    season_number : 1 
    media_type  : 9 
    hd_video  : 0 
    Duration: 00:00:45.43, start: 0.042667, bitrate: 906 kb/s 
    Stream #1:0(eng): Video: h264 (Constrained Baseline) (avc1/0x31637661), yuv420p, 720x576 [SAR 1:1 DAR 5:4], 774 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default) 
    Metadata: 
     handler_name : VideoHandler 
    Stream #1:1(eng): Audio: aac (mp4a/0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default) 
    Metadata: 
     handler_name : SoundHandler 
File 'output.mp4' already exists. Overwrite ? [y/N] y 
[libx264 @ 0x7fa9a8828e00] using SAR=1/1 
[libx264 @ 0x7fa9a8828e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX 
[libx264 @ 0x7fa9a8828e00] profile High, level 3.1 
[libx264 @ 0x7fa9a8828e00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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, mp4, to 'output.mp4': 
    Metadata: 
    major_brand  : isom 
    minor_version : 512 
    compatible_brands: isomiso2avc1mp41 
    encoder   : Lavf55.19.104 
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0]/0x0021), yuv420p, 720x576 [SAR 1:1 DAR 5:4], q=-1--1, 30k tbn, 29.97 tbc (default) 
    Stream #0:1: Audio: aac (libfaac) ([64][0][0][0]/0x0040), 44100 Hz, stereo, s16, 128 kb/s (default) 
Stream mapping: 
    Stream #0:0 (h264) -> scale 
    Stream #0:1 (aac) -> concat:in0:a0 
    Stream #1:0 (h264) -> scale 
    Stream #1:1 (aac) -> concat:in1:a0 
    concat -> Stream #0:0 (libx264) 
    concat -> Stream #0:1 (libfaac) 
Press [q] to stop, [?] for help 
frame= 1453 fps= 42 q=-1.0 Lsize= 4536kB time=00:00:48.50 bitrate= 766.1kbits/s dup=227 drop=0  
video:3796kB audio:691kB subtitle:0 global headers:0kB muxing overhead 1.102067% 
[libx264 @ 0x7fa9a8828e00] frame I:31 Avg QP:17.02 size: 14953 
[libx264 @ 0x7fa9a8828e00] frame P:764 Avg QP:24.14 size: 3677 
[libx264 @ 0x7fa9a8828e00] frame B:658 Avg QP:28.17 size: 933 
[libx264 @ 0x7fa9a8828e00] consecutive B-frames: 36.4% 6.2% 10.3% 47.1% 
[libx264 @ 0x7fa9a8828e00] mb I I16..4: 40.4% 32.3% 27.3% 
[libx264 @ 0x7fa9a8828e00] mb P I16..4: 6.6% 4.0% 1.1% P16..4: 25.2% 5.7% 2.3% 0.0% 0.0% skip:55.0% 
[libx264 @ 0x7fa9a8828e00] mb B I16..4: 0.8% 0.4% 0.2% B16..8: 24.5% 1.7% 0.2% direct: 0.5% skip:71.6% L0:50.7% L1:45.5% BI: 3.9% 
[libx264 @ 0x7fa9a8828e00] 8x8 transform intra:33.3% inter:59.0% 
[libx264 @ 0x7fa9a8828e00] coded y,uvDC,uvAC intra: 26.4% 41.2% 8.0% inter: 5.6% 7.9% 0.2% 
[libx264 @ 0x7fa9a8828e00] i16 v,h,dc,p: 46% 29% 8% 17% 
[libx264 @ 0x7fa9a8828e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 19% 28% 3% 3% 4% 3% 4% 3% 
[libx264 @ 0x7fa9a8828e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 22% 13% 4% 6% 7% 5% 5% 3% 
[libx264 @ 0x7fa9a8828e00] i8c dc,h,v,p: 57% 19% 20% 4% 
[libx264 @ 0x7fa9a8828e00] Weighted P-Frames: Y:1.8% UV:1.2% 
[libx264 @ 0x7fa9a8828e00] ref P L0: 73.2% 9.1% 11.7% 5.3% 0.7% 
[libx264 @ 0x7fa9a8828e00] ref B L0: 89.3% 8.9% 1.8% 
[libx264 @ 0x7fa9a8828e00] ref B L1: 95.3% 4.7% 
[libx264 @ 0x7fa9a8828e00] kb/s:641.26 

Answer 1

나는 그것이 올바르게 적용되지 않은 이유였다 -i 옵션, 후 -ss 인수를 배치했다.

/usr/local/bin/ffmpeg -i intro.mp4 -i input.mp4 -ss 1.5 -filter_complex '[0:v] scale=720:576 [in1]; [1:v] scale=720:576 [in2]; [in1][in2] concat [v]; [0:a][1:a] concat=v=0:a=1 [a]' -map '[v]' -map '[a]' output.mp4 

나는 -i 옵션 전에 배치했는데, 지금은 예상대로 작동합니다.

/usr/local/bin/ffmpeg -i intro.mp4 -ss 1.5 -i input.mp4 -filter_complex '[0:v] scale=720:576 [in1]; [1:v] scale=720:576 [in2]; [in1][in2] concat [v]; [0:a][1:a] concat=v=0:a=1 [a]' -map '[v]' -map '[a]' output.mp4