我正在将视频转换为.mp4格式，但是当我使用ffmpeg使用以下命令转换视频时：
exec('D:\wamp\bin\ffmpeg.exe -y -i D:/wamp/www/upload_google_drive/output.flv -c:v libx264 -crf 19 -preset slow -c:a aac -strict experimental -b:a 192k -ac 2 D:/wamp/www/upload_google_drive/w3.mp4 2>&1',$output);
在某些设备中它不运行。出现的消息是
无法播放此视频。
请帮助解决我的问题。
输出：
Array ( [0] => ffmpeg version N-77137-gff6dd58 Copyright (c) 2000-2015 the FFmpeg developers [1] => built with gcc 5.2.0 (GCC)
[2] => configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
[3] => libavutil 55. 10.100 / 55. 10.100
[4] => libavcodec 57. 17.100 / 57. 17.100
[5] => libavformat 57. 19.100 / 57. 19.100
[6] => libavdevice 57. 0.100 / 57. 0.100
[7] => libavfilter 6. 20.100 / 6. 20.100
[8] => libswscale 4. 0.100 / 4. 0.100
[9] => libswresample 2. 0.101 / 2. 0.101
[10] => libpostproc 54. 0.100 / 54. 0.100
[11] => Input #0, flv, from 'D:/wamp/www/upload_google_drive/output.flv':
[12] => Metadata:
[13] => major_brand : mp42
[14] => minor_version : 1
[15] => compatible_brands: mp42avc1
[16] => encoder : Lavf57.19.100
[17] => Duration: 00:01:00.14, start: 0.000000, bitrate: 307 kb/s
[18] => Stream #0:0: Video: flv1, yuv420p, 480x320, 200 kb/s, 24 fps, 24 tbr, 1k tbn, 1k tbc
[19] => Stream #0:1: Audio: aac (LC), 44100 Hz, mono, fltp, 62 kb/s
[20] => [libx264 @ 0000000001c31860] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[21] => [libx264 @ 0000000001c31860] profile Constrained Baseline, level 3.0 [22] => [libx264 @ 0000000001c31860] 264 - core 148 r2638 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 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=24 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=19.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[23] => Output #0, mp4, to 'D:/wamp/www/upload_google_drive/w5.mp4':
[24] => Metadata:
[25] => major_brand : mp42
[26] => minor_version : 1
[27] => compatible_brands: mp42avc1
[28] => encoder : Lavf57.19.100
[29] => Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 480x320, q=-1--1, 24 fps, 12288 tbn, 24 tbc
[30] => Metadata:
[31] => encoder : Lavc57.17.100 libx264
[32] => Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 192 kb/s
[33] => Metadata:
[34] => encoder : Lavc57.17.100 aac
[35] => Stream mapping:
[36] => Stream #0:0 -> #0:0 (flv1 (flv) -> h264 (libx264))
[37] => Stream #0:1 -> #0:1 (aac (native) -> aac (native))
[38] => Press [q] to stop, [?] for help
[39] => frame= 55 fps=0.0 q=23.0 size= 27kB time=00:00:02.22 bitrate= 98.2kbits/s frame= 96 fps= 93 q=24.0 size= 137kB time=00:00:03.92 bitrate= 285.4kbits/s frame= 161 fps=105 q=24.0 size= 317kB time=00:00:06.64 bitrate= 391.6kbits/s frame= 220 fps=108 q=24.0 size= 541kB time=00:00:09.07 bitrate= 487.8kbits/s frame= 274 fps=108 q=24.0 size= 773kB time=00:00:11.35 bitrate= 557.8kbits/s frame= 326 fps=107 q=24.0 size= 1109kB time=00:00:13.53 bitrate= 671.4kbits/s Past duration 0.607994 too large
[40] => Last message repeated 1 times
[41] => Past duration 0.615990 too large
[42] => Past duration 0.607994 too large
[43] => frame= 382 fps=108 q=24.0 size= 1439kB time=00:00:15.81 bitrate= 745.6kbits/s Past duration 0.615990 too large
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[97] => frame= 436 fps=108 q=24.0 size= 1732kB time=00:00:18.08 bitrate= 784.5kbits/s Past duration 0.687996 too large
[98] => Past duration 0.703987 too large
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[169] => frame= 508 fps=112 q=24.0 size= 1953kB time=00:00:21.10 bitrate= 758.1kbits/s Past duration 0.807991 too large
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[231] => Past duration 0.911995 too large
[232] => frame= 571 fps=113 q=24.0 size= 2150kB time=00:00:23.68 bitrate= 743.7kbits/s Past duration 0.903999 too large
[233] => Past duration 0.919991 too large
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[246] => Past duration 0.935997 too large
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[251] => Past duration 0.943993 too large
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[281] => Past duration 0.991997 too large
[282] => Past duration 0.983986 too large
[283] => frame= 622 fps=112 q=24.0 size= 2328kB time=00:00:25.82 bitrate= 738.7kbits/s Past duration 0.999992 too large
[284] => Past duration 0.991997 too large
[285] => Past duration 0.999992 too large
[286] => Past duration 0.991997 too large
[287] => Past duration 0.999992 too large
[288] => Last message repeated 1 times
[289] => frame= 672 fps=111 q=24.0 size= 2585kB time=00:00:27.91 bitrate= 758.8kbits/s frame= 719 fps=110 q=24.0 size= 2829kB time=00:00:29.86 bitrate= 776.0kbits/s frame= 765 fps=109 q=24.0 size= 3063kB time=00:00:31.76 bitrate= 789.8kbits/s frame= 812 fps=108 q=24.0 size= 3282kB time=00:00:33.71 bitrate= 797.5kbits/s frame= 853 fps=106 q=24.0 size= 3472kB time=00:00:35.45 bitrate= 802.2kbits/s frame= 897 fps=105 q=24.0 size= 3713kB time=00:00:37.26 bitrate= 816.1kbits/s frame= 943 fps=104 q=24.0 size= 3960kB time=00:00:39.17 bitrate= 828.0kbits/s frame= 987 fps=103 q=24.0 size= 4205kB time=00:00:41.00 bitrate= 840.1kbits/s frame= 1033 fps=102 q=24.0 size= 4442kB time=00:00:42.91 bitrate= 848.1kbits/s frame= 1074 fps=101 q=24.0 size= 4627kB time=00:00:44.60 bitrate= 849.7kbits/s frame= 1123 fps=101 q=24.0 size= 4861kB time=00:00:46.67 bitrate= 853.3kbits/s frame= 1168 fps=101 q=24.0 size= 5079kB time=00:00:48.52 bitrate= 857.3kbits/s frame= 1216 fps=100 q=24.0 size= 5312kB time=00:00:50.52 bitrate= 861.3kbits/s frame= 1254 fps= 99 q=24.0 size= 5519kB time=00:00:52.10 bitrate= 867.7kbits/s frame= 1302 fps= 99 q=24.0 size= 5751kB time=00:00:54.12 bitrate= 870.5kbits/s frame= 1358 fps= 99 q=24.0 size= 6002kB time=00:00:56.47 bitrate= 870.8kbits/s dup=0 drop=1 frame= 1427 fps=101 q=24.0 size= 6243kB time=00:00:59.35 bitrate= 861.8kbits/s dup=0 drop=1 frame= 1444 fps=100 q=-1.0 Lsize= 6451kB time=00:01:00.16 bitrate= 878.3kbits/s dup=0 drop=1
[290] => video:5008kB audio:1407kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.550038%
[291] => [libx264 @ 0000000001c31860] frame I:10 Avg QP:13.67 size: 25967
[292] => [libx264 @ 0000000001c31860] frame P:1434 Avg QP:18.73 size: 3395
[293] => [libx264 @ 0000000001c31860] mb I I16..4: 36.0% 0.0% 64.0%
[294] => [libx264 @ 0000000001c31860] mb P I16..4: 3.6% 0.0% 4.0% P16..4: 21.9% 5.5% 4.2% 0.0% 0.0% skip:60.8%
[295] => [libx264 @ 0000000001c31860] coded y,uvDC,uvAC intra: 51.3% 62.1% 11.5% inter: 11.4% 14.4% 2.1%
[296] => [libx264 @ 0000000001c31860] i16 v,h,dc,p: 52% 30% 16% 2%
[297] => [libx264 @ 0000000001c31860] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 25% 17% 3% 4% 4% 3% 4% 5%
[298] => [libx264 @ 0000000001c31860] i8c dc,h,v,p: 39% 32% 25% 4%
[299] => [libx264 @ 0000000001c31860] ref P L0: 82.2% 8.5% 4.8% 2.2% 2.3%
[300] => [libx264 @ 0000000001c31860] kb/s:681.85 [301] => [aac @ 0000000001c322a0] Qavg: 14325.964 )
答案 0 :(得分：0)
您应该尝试使用最大化与不同设备（包括Android设备）兼容性的基线配置文件，尝试将-profile:v baseline -level 3.0添加到您的命令中。
有关更多配置文件兼容性信息，请参阅此链接：https://trac.ffmpeg.org/wiki/Encode/H.264#Compatibility