问题描述
问题：我在一个列表中有 7 个图像（具有不同的大小、分辨率和格式）。我正在添加一个 mp3 音频文件和淡入淡出效果，同时使用它们制作幻灯片，因为我正在尝试按照以下命令进行
val inputCommandinitial = arrayOf("-y","-framerate","1/5")
val arrTop = ArrayList<String>()
//Add all paths
for (i in images!!.indices) {
arrTop.add("-loop")
arrTop.add("1")
arrTop.add("-t")
arrTop.add("5")
arrTop.add("-i")
arrTop.add(images!![i].path)
}
//Apply filter graph
arrTop.add("-i")
arrTop.add(audio!!.path)
arrTop.add("-filter_complex")
val stringBuilder = StringBuilder()
for (i in images!!.indices) {
stringBuilder.append("[$i:v]scale=720:1280:force_original_aspect_ratio=decrease,pad=720:1280:(ow-iw)/2:(oh-ih)/2,setsar=1,fade=t=in:st=0:d=1,fade=t=out:st=5:d=1[v$i];")
}
for (i in images!!.indices) {
stringBuilder.append("[v$i]")
}
//Concat command
stringBuilder.append("concat=n=${images!!.size}:v=1:a=0,fps=25,format=yuv420p[v]")
val endcommand = arrayOf("-map","[v]","-map","${images!!.size}:a","-c:a","copy","-preset","ultrafast","-shortest",outputLocation.path)
val finalCommand = (inputCommandinitial + arrTop + stringBuilder.toString() + endcommand)
但是，它会跳过第一张图片并显示其余 6 张图片，视频输出持续时间为 30 秒，我从 3 天开始一直在尝试
要求： 制作具有不同格式、大小、分辨率等的幻灯片，即由用户从图库中选择并在幻灯片中显示，在后面添加音频，具有淡入淡出效果
这里是完整的日志：
I/mobile-ffmpeg: Loading mobile-ffmpeg.
I/mobile-ffmpeg: Loaded mobile-ffmpeg-full-gpl-x86-4.4-lts-20200803.
D/mobile-ffmpeg: Callback thread started.
I/mobile-ffmpeg: ffmpeg version v4.4-dev-416
I/mobile-ffmpeg: copyright (c) 2000-2020 the FFmpeg developers
I/mobile-ffmpeg: built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)
I/mobile-ffmpeg: configuration: --cross-prefix=i686-linux-android- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-x86/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=i686 --cpu=i686 --cc=i686-linux-android16-clang --cxx=i686-linux-android16-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-x86/cpu-features/lib -lndk_compat' --target-os=android --disable-neon --disable-asm --disable-inline-asm --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-openssl --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolBox --disable-audiotoolBox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec
I/mobile-ffmpeg: libavutil 56. 55.100 / 56. 55.100
I/mobile-ffmpeg: libavcodec 58. 96.100 / 58. 96.100
I/mobile-ffmpeg: libavformat 58. 48.100 / 58. 48.100
I/mobile-ffmpeg: libavdevice 58. 11.101 / 58. 11.101
I/mobile-ffmpeg: libavfilter 7. 87.100 / 7. 87.100
I/mobile-ffmpeg: libswscale 5. 8.100 / 5. 8.100
I/mobile-ffmpeg: libswresample 3. 8.100 / 3. 8.100
I/mobile-ffmpeg: Input #0,png_pipe,from '/storage/emulated/0/FFMpeg Example/image1.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg: Stream #0:0
I/mobile-ffmpeg: : Video: png,rgb24(pc),800x500 [SAR 11811:11811 DAR 8:5]
I/mobile-ffmpeg:,I/mobile-ffmpeg: 0.20 tbr,I/mobile-ffmpeg: 0.20 tbn,I/mobile-ffmpeg: 0.20 tbc
W/mobile-ffmpeg: [png_pipe @ 0xe1a8ec00] Stream #0: not enough frames to estimate rate; consider increasing probesize
I/mobile-ffmpeg: Input #1,from '/storage/emulated/0/FFMpeg Example/image2.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg: Stream #1:0
I/mobile-ffmpeg: : Video: png,1920x1080 [SAR 3779:3779 DAR 16:9]
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 tbr,I/mobile-ffmpeg: 25 tbn,I/mobile-ffmpeg: 25 tbc
I/mobile-ffmpeg: Input #2,from '/storage/emulated/0/FFMpeg Example/one.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg: Stream #2:0
I/mobile-ffmpeg: : Video: png,rgba(pc),720x1280
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 fps,I/mobile-ffmpeg: 25 tbc
I/mobile-ffmpeg: Input #3,image2,from '/storage/emulated/0/FFMpeg Example/two.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: 00:00:00.04
I/mobile-ffmpeg:,start:
I/mobile-ffmpeg: 0.000000
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: 7955 kb/s
I/mobile-ffmpeg: Stream #3:0
I/mobile-ffmpeg: : Video: mjpeg,yuvj420p(pc,bt470bg/unkNown/unkNown),564x1002 [SAR 72:72 DAR 94:167]
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 tbc
W/mobile-ffmpeg: [png_pipe @ 0xe1a90a00] Stream #0: not enough frames to estimate rate; consider increasing probesize
I/mobile-ffmpeg: Input #4,from '/storage/emulated/0/FFMpeg Example/image3.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg: Stream #4:0
I/mobile-ffmpeg: : Video: png,1820x1024
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 tbc
I/mobile-ffmpeg: Input #5,from '/storage/emulated/0/FFMpeg Example/image4.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: N/A
I/mobile-ffmpeg: Stream #5:0
I/mobile-ffmpeg: : Video: png,1920x800 [SAR 2835:2835 DAR 12:5]
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 tbc
I/mobile-ffmpeg: Input #6,from '/storage/emulated/0/FFMpeg Example/image5.png':
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: 00:00:00.04
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: 159573 kb/s
I/mobile-ffmpeg: Stream #6:0
I/mobile-ffmpeg: : Video: mjpeg,yuvj444p(pc,1600x900
I/mobile-ffmpeg:,I/mobile-ffmpeg: 25 tbc
W/mobile-ffmpeg: [mp3 @ 0xe1a92800] Estimating duration from bitrate,this may be inaccurate
I/mobile-ffmpeg: Input #7,mp3,from '/storage/emulated/0/FFMpeg Example/shortmusic.mp3':
I/mobile-ffmpeg: Metadata:
I/mobile-ffmpeg: track :
I/mobile-ffmpeg: 25
I/mobile-ffmpeg: artist :
I/mobile-ffmpeg: longzijun
I/mobile-ffmpeg: title :
I/mobile-ffmpeg: Memoryne Music Box Version
I/mobile-ffmpeg: album_artist :
I/mobile-ffmpeg: longzijun
I/mobile-ffmpeg: genre :
I/mobile-ffmpeg: Soundtrack
I/mobile-ffmpeg: date :
I/mobile-ffmpeg: 2012
I/mobile-ffmpeg: Duration:
I/mobile-ffmpeg: 00:00:57.70
I/mobile-ffmpeg:,bitrate:
I/mobile-ffmpeg: 320 kb/s
I/mobile-ffmpeg: Stream #7:0
I/mobile-ffmpeg: : Audio: mp3,48000 Hz,stereo,fltp,320 kb/s
I/mobile-ffmpeg: Stream mapping:
I/mobile-ffmpeg: Stream #0:0 (png) -> scale
I/mobile-ffmpeg: Stream #1:0 (png) -> scale
I/mobile-ffmpeg: Stream #2:0 (png) -> scale
I/mobile-ffmpeg: Stream #3:0 (mjpeg) -> scale
I/mobile-ffmpeg: Stream #4:0 (png) -> scale
I/mobile-ffmpeg: Stream #5:0 (png) -> scale
I/mobile-ffmpeg: Stream #6:0 (mjpeg) -> scale
I/mobile-ffmpeg: format
I/mobile-ffmpeg: -> Stream #0:0 (libx264)
I/mobile-ffmpeg: Stream #7:0 -> #0:1
I/mobile-ffmpeg: (copy)
I/mobile-ffmpeg: Press [q] to stop,[?] for help
I/mobile-ffmpeg: frame= 0 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A
W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0xe1a1bec0] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 1:0 @ 0xe1a1bf20] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 2:0 @ 0xe1a1bfe0] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 3:0 @ 0xe1a1c0a0] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 4:0 @ 0xe1a1c160] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 5:0 @ 0xe1a1c220] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [graph 0 input from stream 6:0 @ 0xe1a1c2e0] sws_param option is deprecated and ignored
W/mobile-ffmpeg: [swscaler @ 0xbf684840] deprecated pixel format used,make sure you did set range correctly
W/mobile-ffmpeg: [swscaler @ 0xbf68fec0] deprecated pixel format used,make sure you did set range correctly
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] using SAR=1/1
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] using cpu capabilities: none!
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] profile Constrained Baseline,level 3.1,4:2:0,8-bit
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] 264 - core 160 - H.264/MPEG-4 AVC codec - copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=4 lookahead_threads=1 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=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
I/mobile-ffmpeg: Output #0,mp4,to '/storage/emulated/0/FFMpeg Example/video/movie_1615954349867.mp4':
I/mobile-ffmpeg: Metadata:
I/mobile-ffmpeg: encoder :
I/mobile-ffmpeg: Lavf58.48.100
I/mobile-ffmpeg: Stream #0:0
I/mobile-ffmpeg: : Video: h264 (libx264) (avc1 / 0x31637661),yuv420p,720x1280 [SAR 1:1 DAR 9:16],q=-1--1
I/mobile-ffmpeg:,I/mobile-ffmpeg: 12800 tbn,I/mobile-ffmpeg: 25 tbc
I/mobile-ffmpeg: (default)
I/mobile-ffmpeg: Metadata:
I/mobile-ffmpeg: encoder :
I/mobile-ffmpeg: Lavc58.96.100 libx264
I/mobile-ffmpeg: Side data:
I/mobile-ffmpeg:
I/mobile-ffmpeg: cpb:
I/mobile-ffmpeg: bitrate max/min/avg: 0/0/0 buffer size: 0
I/mobile-ffmpeg: vbv_delay: N/A
I/mobile-ffmpeg: Stream #0:1
I/mobile-ffmpeg: : Audio: mp3 (mp4a / 0x6134706D),320 kb/s
I/mobile-ffmpeg: frame= 0 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x
I/mobile-ffmpeg: frame= 7 fps=3.8 q=20.0 size= 0kB time=00:00:00.04 bitrate= 9.6kbits/s speed=0.0215x
I/mobile-ffmpeg: frame= 15 fps=6.3 q=22.0 size= 0kB time=00:00:00.36 bitrate= 1.1kbits/s speed=0.151x
I/mobile-ffmpeg: frame= 24 fps=8.2 q=23.0 size= 256kB time=00:00:00.72 bitrate=2912.9kbits/s speed=0.245x
I/mobile-ffmpeg: frame= 33 fps=9.5 q=14.0 size= 512kB time=00:00:01.08 bitrate=3883.7kbits/s speed=0.31x
I/mobile-ffmpeg: frame= 44 fps= 11 q=12.0 size= 512kB time=00:00:01.52 bitrate=2759.5kbits/s speed=0.379x
I/mobile-ffmpeg: frame= 55 fps= 12 q=12.0 size= 512kB time=00:00:01.96 bitrate=2140.1kbits/s speed=0.432x
I/mobile-ffmpeg: frame= 68 fps= 13 q=12.0 size= 768kB time=00:00:02.48 bitrate=2537.0kbits/s speed=0.491x
I/mobile-ffmpeg: frame= 77 fps= 14 q=12.0 size= 768kB time=00:00:02.84 bitrate=2215.4kbits/s speed=0.499x
I/mobile-ffmpeg: frame= 84 fps= 13 q=12.0 size= 768kB time=00:00:03.12 bitrate=2016.6kbits/s speed=0.499x
I/mobile-ffmpeg: frame= 94 fps= 14 q=12.0 size= 768kB time=00:00:03.52 bitrate=1787.4kbits/s speed=0.52x
I/mobile-ffmpeg: frame= 102 fps= 14 q=12.0 size= 768kB time=00:00:03.84 bitrate=1638.5kbits/s speed=0.525x
I/mobile-ffmpeg: frame= 116 fps= 15 q=12.0 size= 768kB time=00:00:04.40 bitrate=1429.9kbits/s speed=0.556x
I/mobile-ffmpeg: frame= 127 fps= 15 q=12.0 size= 768kB time=00:00:04.84 bitrate=1299.9kbits/s speed=0.574x
I/mobile-ffmpeg: frame= 134 fps= 15 q=21.0 size= 768kB time=00:00:05.12 bitrate=1228.9kbits/s speed=0.571x
I/mobile-ffmpeg: frame= 140 fps= 15 q=22.0 size= 1024kB time=00:00:05.36 bitrate=1565.1kbits/s speed=0.56x
I/mobile-ffmpeg: frame= 145 fps= 14 q=23.0 size= 1024kB time=00:00:05.56 bitrate=1508.8kbits/s speed=0.55x
I/mobile-ffmpeg: frame= 151 fps= 14 q=23.0 size= 1280kB time=00:00:05.80 bitrate=1807.9kbits/s speed=0.546x
I/mobile-ffmpeg: frame= 164 fps= 15 q=12.0 size= 1536kB time=00:00:06.32 bitrate=1991.0kbits/s speed=0.567x
I/mobile-ffmpeg: frame= 172 fps= 15 q=12.0 size= 1536kB time=00:00:06.64 bitrate=1895.1kbits/s speed=0.569x
I/mobile-ffmpeg: frame= 186 fps= 15 q=12.0 size= 1536kB time=00:00:07.20 bitrate=1747.7kbits/s speed=0.592x
I/mobile-ffmpeg: frame= 207 fps= 16 q=12.0 size= 1536kB time=00:00:08.04 bitrate=1565.1kbits/s speed=0.634x
I/mobile-ffmpeg: frame= 229 fps= 17 q=12.0 size= 1792kB time=00:00:08.92 bitrate=1645.8kbits/s speed=0.677x
I/mobile-ffmpeg: frame= 249 fps= 18 q=12.0 size= 1792kB time=00:00:09.72 bitrate=1510.3kbits/s speed=0.71x
I/mobile-ffmpeg: frame= 270 fps= 19 q=21.0 size= 2048kB time=00:00:10.56 bitrate=1588.8kbits/s speed=0.744x
I/mobile-ffmpeg: frame= 296 fps= 20 q=12.0 size= 2304kB time=00:00:11.60 bitrate=1627.1kbits/s speed=0.789x
I/mobile-ffmpeg: frame= 319 fps= 21 q=12.0 size= 2304kB time=00:00:12.52 bitrate=1507.6kbits/s speed=0.823x
I/mobile-ffmpeg: frame= 337 fps= 21 q=12.0 size= 2304kB time=00:00:13.24 bitrate=1425.6kbits/s speed=0.839x
I/mobile-ffmpeg: frame= 347 fps= 21 q=12.0 size= 2304kB time=00:00:13.64 bitrate=1383.8kbits/s speed=0.835x
I/mobile-ffmpeg: frame= 360 fps= 21 q=12.0 size= 2560kB time=00:00:14.16 bitrate=1481.1kbits/s speed=0.841x
I/mobile-ffmpeg: frame= 382 fps= 22 q=19.0 size= 2560kB time=00:00:15.04 bitrate=1394.4kbits/s speed=0.866x
I/mobile-ffmpeg: frame= 395 fps= 22 q=22.0 size= 2816kB time=00:00:15.56 bitrate=1482.6kbits/s speed=0.869x
I/mobile-ffmpeg: frame= 407 fps= 22 q=15.0 size= 3072kB time=00:00:16.04 bitrate=1569.0kbits/s speed=0.872x
I/mobile-ffmpeg: frame= 421 fps= 22 q=12.0 size= 3072kB time=00:00:16.60 bitrate=1516.0kbits/s speed=0.875x
I/mobile-ffmpeg: frame= 432 fps= 22 q=12.0 size= 3072kB time=00:00:17.04 bitrate=1476.9kbits/s speed=0.875x
I/mobile-ffmpeg: frame= 446 fps= 22 q=12.0 size= 3072kB time=00:00:17.60 bitrate=1429.9kbits/s speed=0.88x
I/mobile-ffmpeg: frame= 458 fps= 22 q=12.0 size= 3328kB time=00:00:18.08 bitrate=1507.9kbits/s speed=0.879x
I/mobile-ffmpeg: frame= 472 fps= 22 q=12.0 size= 3328kB time=00:00:18.64 bitrate=1462.6kbits/s speed=0.884x
I/mobile-ffmpeg: frame= 489 fps= 23 q=12.0 size= 3328kB time=00:00:19.32 bitrate=1411.1kbits/s speed=0.894x
I/mobile-ffmpeg: frame= 509 fps= 23 q=19.0 size= 3328kB time=00:00:20.12 bitrate=1355.0kbits/s speed=0.909x
I/mobile-ffmpeg: frame= 531 fps= 23 q=15.0 size= 3584kB time=00:00:21.00 bitrate=1398.1kbits/s speed=0.928x
I/mobile-ffmpeg: frame= 555 fps= 24 q=12.0 size= 3840kB time=00:00:21.96 bitrate=1432.5kbits/s speed=0.949x
I/mobile-ffmpeg: frame= 577 fps= 24 q=12.0 size= 3840kB time=00:00:22.84 bitrate=1377.3kbits/s speed=0.966x
I/mobile-ffmpeg: frame= 599 fps= 25 q=12.0 size= 3840kB time=00:00:23.72 bitrate=1326.2kbits/s speed=0.981x
I/mobile-ffmpeg: frame= 620 fps= 25 q=12.0 size= 3840kB time=00:00:24.56 bitrate=1280.8kbits/s speed=0.995x
I/mobile-ffmpeg: frame= 630 fps= 25 q=18.0 size= 3840kB time=00:00:24.96 bitrate=1260.3kbits/s speed=0.99x
I/mobile-ffmpeg: frame= 640 fps= 25 q=21.0 size= 4096kB time=00:00:25.36 bitrate=1323.1kbits/s speed=0.985x
I/mobile-ffmpeg: frame= 652 fps= 25 q=22.0 size= 4352kB time=00:00:25.84 bitrate=1379.7kbits/s speed=0.984x
I/mobile-ffmpeg: frame= 665 fps= 25 q=12.0 size= 4608kB time=00:00:26.36 bitrate=1432.1kbits/s speed=0.984x
I/mobile-ffmpeg: frame= 678 fps= 25 q=12.0 size= 4608kB time=00:00:26.88 bitrate=1404.4kbits/s speed=0.984x
I/mobile-ffmpeg: frame= 690 fps= 25 q=12.0 size= 4608kB time=00:00:27.36 bitrate=1379.7kbits/s speed=0.983x
I/mobile-ffmpeg: frame= 703 fps= 25 q=12.0 size= 4608kB time=00:00:27.88 bitrate=1354.0kbits/s speed=0.983x
I/mobile-ffmpeg: frame= 716 fps= 25 q=12.0 size= 4608kB time=00:00:28.40 bitrate=1329.2kbits/s speed=0.983x
I/mobile-ffmpeg: frame= 729 fps= 25 q=12.0 size= 4608kB time=00:00:28.92 bitrate=1305.3kbits/s speed=0.983x
I/mobile-ffmpeg: frame= 742 fps= 25 q=12.0 size= 4608kB time=00:00:29.44 bitrate=1282.2kbits/s speed=0.983x
I/mobile-ffmpeg: frame= 749 fps= 25 q=-1.0 Lsize= 4883kB time=00:00:29.95 bitrate=1335.5kbits/s speed=0.988x
I/mobile-ffmpeg: video:3696kB audio:1171kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead:
I/mobile-ffmpeg: 0.326516%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] frame I:3 Avg QP:13.33 size: 2725
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] frame P:746 Avg QP:13.98 size: 5062
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] mb I I16..4: 100.0% 0.0% 0.0%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] mb P I16..4: 7.1% 0.0% 0.0% P16..4: 8.2% 0.0% 0.0% 0.0% 0.0% skip:84.7%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] coded y,uvDC,uvAC intra: 14.5% 19.0% 6.9% inter: 5.1% 5.4% 1.4%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] i16 v,h,dc,p: 65% 18% 7% 9%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] i8c dc,v,p: 71% 19% 6% 4%
I/mobile-ffmpeg: [libx264 @ 0xe1ad4400] kb/s:1010.47
I/mobile-ffmpeg: Async command execution completed successfully.
这里的命令是 ffmpeg 语法
"-y"
"-framerate"
"1/5"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/image1.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/image2.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/one.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/two.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/image3.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/image4.png"
"-loop"
"1"
"-t"
"5"
"-i"
"/storage/emulated/0/FFMpeg Example/image5.png"
"-i"
"/storage/emulated/0/FFMpeg Example/shortmusic.mp3"
"-filter_complex"
"[0:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v0];
[1:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v1];
[2:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v2];
[3:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v3];
[4:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v4];
[5:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v5];
[6:v]scale=720:1280:force_original_aspect_ratio=decrease,fade=t=out:st=5:d=1[v6];
[v0][v1][v2][v3][v4][v5][v6]concat=n=7:v=1:a=0,format=yuv420p[v]"
"-map"
"[v]"
"-map"
"7:a"
"-c:a"
"copy"
"-preset"
"ultrafast"
"-shortest"
"/storage/emulated/0/FFMpeg Example/video/movie_1615955101725.mp4"
解决方法
删除-framerate 1/5。对于给定的 -t 来说，这个值太低了，而且它不能很好地处理淡入淡出（图像淡入淡出速度为 0.2 fps）。您仅将其应用于第一个输入，而其余部分则使用默认的 -framerate 25。删除它，图像将可见。
或者，对每个图像输入使用 -framerate 1，并在每个 fps=25 后添加 setsar。速度会快很多。