我经营一个编程爱好者用户＆＃39;小组，我已经开始录制视频记录每次见面时给出的谈话。我试图构建一个ffmpeg命令来获取两个视频输入流，一个是屏幕捕获，另一个是扬声器，然后将它们组合成一个带有画中画的视频，从扬声器视频中获取音频。我有一个基本的画中画工作在一个简单的ffmpeg命令，但我希望能够指定视频的开头和结尾只显示扬声器，而中间是画中画，扬声器在右上角。
这是我到目前为止所拥有的：
ffmpeg \
-ss 22 \
-i "capture.mp4" \
-ss 32 \
-i "speaker.mov" \
-filter_complex "[1] split=3[s1][s2][s3]; [s1] trim=0:10, scale=1920x1080 [prefix]; [s2] trim=10:, scale=iw/5:ih/5 [pip]; [s3] trim=0:0, scale=1920x1080 [suffix]; [0] copy [c]; [c][pip] overlay=main_w-overlay_w:0 [body]; [prefix][body][suffix] concat=n=3 [out]" \
-map "[out]" \
-profile:v baseline \
-level 3.0 \
-b:v 440k \
-vcodec libx264 \
-acodec copy \
-y \
ffmpeg-test.mov
目前，有两个问题：
输出中没有声音
在画中画部分，扬声器的动作并不平滑;即使扬声器视频为29.97 fps，视频也会像每半秒采样一样跳跃。 （也许问题是它匹配捕获帧速率，即5 fps。）
我尝试在一个命令中执行此操作，以便尽快进行处理。
有没有办法用ffmpeg完成这个？能够尽可能地自动化这个过程真的有助于我。
感谢。
编辑：按照LordNeckbeard的要求，这是完整的控制台输出：ffmpeg version 2.8.1 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 7.0.0 (clang-700.0.72)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.1_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'capture.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isomavc1
creation_time : 2015-11-09 17:29:41
Duration: 01:42:51.90, start: 0.000000, bitrate: 115 kb/s
Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 4 kb/s (default)
Metadata:
handler_name : AAC stream handler
Stream #0:1(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 109 kb/s, 5 fps, 5 tbr, 90k tbn, 180k tbc (default)
Metadata:
handler_name : Citrix h264 stream handler
encoder : AVC Coding
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'speaker.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2015-11-09 21:17:52
Duration: 00:59:57.60, start: 0.000000, bitrate: 7264 kb/s
Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(bt709), 1440x1080 [SAR 4:3 DAR 16:9], 5724 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 59.94 tbc (default)
Metadata:
creation_time : 2015-11-09 21:17:52
handler_name : Apple Alias Data Handler
encoder : AVCHD 1080i60
timecode : 00:00:00;00
Stream #1:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2015-11-09 21:17:52
handler_name : Apple Alias Data Handler
Stream #1:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2015-11-09 21:17:52
handler_name : Apple Alias Data Handler
timecode : 00:00:00;00
[libx264 @ 0x7f99a980de00] using SAR=1/1
[libx264 @ 0x7f99a980de00] frame MB size (120x68) > level limit (1620)
[libx264 @ 0x7f99a980de00] DPB size (1 frames, 8160 mbs) > level limit (0 frames, 8100 mbs)
[libx264 @ 0x7f99a980de00] MB rate (244555) > level limit (40500)
[libx264 @ 0x7f99a980de00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x7f99a980de00] profile Constrained Baseline, level 3.0
[libx264 @ 0x7f99a980de00] 264 - core 148 r2601 a0cd7d3 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=440 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mov, to 'cli-ffmpeg-test.mov':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isomavc1
encoder : Lavf56.40.101
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 440 kb/s, 29.97 fps, 11988 tbn, 29.97 tbc (default)
Metadata:
encoder : Lavc56.60.100 libx264
Stream mapping:
Stream #0:1 (h264) -> copy
Stream #1:0 (h264) -> split
concat -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
frame=184483 fps=117 q=-1.0 Lsize= 256071kB time=01:42:35.58 bitrate= 340.8kbits/s dup=153456 drop=0
video:255343kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.285118%
[libx264 @ 0x7f99a980de00] frame I:779 Avg QP: 5.70 size:181781
[libx264 @ 0x7f99a980de00] frame P:183704 Avg QP:10.00 size: 652
[libx264 @ 0x7f99a980de00] mb I I16..4: 77.8% 0.0% 22.2%
[libx264 @ 0x7f99a980de00] mb P I16..4: 0.1% 0.0% 0.0% P16..4: 0.4% 0.1% 0.1% 0.0% 0.0% skip:99.3%
[libx264 @ 0x7f99a980de00] final ratefactor: 13.35
[libx264 @ 0x7f99a980de00] coded y,uvDC,uvAC intra: 21.1% 28.5% 19.4% inter: 0.2% 0.2% 0.1%
[libx264 @ 0x7f99a980de00] i16 v,h,dc,p: 74% 23% 1% 2%
[libx264 @ 0x7f99a980de00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 26% 15% 4% 4% 5% 4% 4% 5%
[libx264 @ 0x7f99a980de00] i8c dc,h,v,p: 68% 20% 10% 1%
[libx264 @ 0x7f99a980de00] kb/s:339.82
再次感谢。