8

我已使用 ffmpeg 成功将文件编码为 .mp4，该文件将在除 Chrome 之外的所有测试设备（PC 上的 Safari、PC 上的 IE、Android 浏览器、Andriod 视频播放器和 Safari iPad）中播放。

作为一种解决方法，我计划在 .mp4 源之前简单地列出 .ogg 源，这样 chrome 就可以播放 .ogg 源，甚至看不到 .mp4 源，但是，我遇到了这里提到的问题。

基本上，我在使用正确的 ffmpeg 命令，该命令会将 .mp4 视频编码为可以在 Chrome 中播放的标准 - 当然不会丢失任何其他前面提到的平台上的播放功能。

我尝试了几种组合，例如：

ffmpeg -i [filename].wmv -vprofile baseline -level 30 -vf scale=640:-1 -movflags faststart [filename].mp4

等等，但还没有找到获胜者。

编辑：我试过：

ffmpeg_new -i [filename].wmv -strict experimental –acodec libvo_aacenc -ac 2 -ab 160k -vcodec libx264 -vf scale=640:-1 -pix_fmt yuv420p -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 [filename].mp4

这是 ffmpeg 输出：

ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
  libavutil      52. 37.101 / 52. 37.101
  libavcodec     55. 17.100 / 55. 17.100
  libavformat    55. 10.100 / 55. 10.100
  libavdevice    55.  2.100 / 55.  2.100
  libavfilter     3. 77.101 /  3. 77.101
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[asf @ 000000000254f9e0] Stream #0: not enough frames to estimate rate; consider
 increasing probesize
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, asf, from 'C:\vidtests\Wildlife.wmv':
  Metadata:
    SfOriginalFPS   : 299700
    WMFSDKVersion   : 11.0.6001.7000
    WMFSDKNeeded    : 0.0.0.0000
    comment         : Footage: Small World Productions, Inc; Tourism New Zealand
 | Producer: Gary F. Spradling | Music: Steve Ball
    title           : Wildlife in HD
    copyright       : © 2008 Microsoft Corporation
    IsVBR           : 0
    DeviceConformanceTemplate: AP@L3
  Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
    Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp
, 192 kb/s
    Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x7
20, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
Please use -b:a or -b:v, -b is ambiguous
[libx264 @ 000000000264faa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64

[libx264 @ 000000000264faa0] profile Constrained Baseline, level 3.0
[libx264 @ 000000000264faa0] 264 - core 133 r2334 a3ac64b - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 r
ef=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_pski
p=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 deci
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyi
nt=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1
 bitrate=1200 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000
 vbv_bufsize=10000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'C:\vidtests\Wildlife_SE1.mp4':
  Metadata:
    SfOriginalFPS   : 299700
    WMFSDKVersion   : 11.0.6001.7000
    WMFSDKNeeded    : 0.0.0.0000
    comment         : Footage: Small World Productions, Inc; Tourism New Zealand
 | Producer: Gary F. Spradling | Music: Steve Ball
    title           : Wildlife in HD
    copyright       : © 2008 Microsoft Corporation
    IsVBR           : 0
    DeviceConformanceTemplate: AP@L3
    encoder         : Lavf55.10.100
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
40x360, q=-1--1, 1200 kb/s, 30k tbn, 29.97 tbc
    Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100
Hz, stereo, s16, 160 kb/s
Stream mapping:
  Stream #0:1 -> #0:0 (vc1 -> libx264)
  Stream #0:0 -> #0:1 (wmav2 -> libvo_aacenc)
Press [q] to stop, [?] for help
frame=   59 fps= 55 q=32.0 size=       0kB time=00:00:00.16 bitrate=   2.3kbits/
frame=   66 fps= 42 q=31.0 size=       0kB time=00:00:00.40 bitrate=   1.0kbits/
frame=   75 fps= 35 q=31.0 size=       0kB time=00:00:00.70 bitrate=   0.5kbits/
frame=   84 fps= 31 q=31.0 size=       0kB time=00:00:01.00 bitrate=   0.4kbits/
frame=   93 fps= 29 q=31.0 size=       0kB time=00:00:01.30 bitrate=   0.3kbits/
frame=  102 fps= 27 q=31.0 size=       0kB time=00:00:01.60 bitrate=   0.2kbits/
frame=  111 fps= 26 q=31.0 size=      38kB time=00:00:01.90 bitrate= 165.1kbits/
Queue input is backward in time
[mp4 @ 000000000264f2c0] Non-monotonous DTS in output stream 0:1; previous: 7616
, current: 7063; changing to 7617. This may result in incorrect timestamps in th
e output file.
frame=  120 fps= 25 q=31.0 size=     107kB time=00:00:02.20 bitrate= 397.7kbits/
frame=  128 fps= 24 q=31.0 size=     161kB time=00:00:02.46 bitrate= 534.1kbits/
frame=  137 fps= 23 q=31.0 size=     194kB time=00:00:02.76 bitrate= 572.6kbits/
frame=  145 fps= 23 q=31.0 size=     219kB time=00:00:03.03 bitrate= 592.1kbits/
frame=  153 fps= 22 q=31.0 size=     273kB time=00:00:03.30 bitrate= 677.8kbits/
frame=  162 fps= 22 q=31.0 size=     317kB time=00:00:03.60 bitrate= 720.8kbits/
frame=  170 fps= 21 q=31.0 size=     366kB time=00:00:03.87 bitrate= 775.2kbits/
frame=  177 fps= 21 q=31.0 size=     451kB time=00:00:04.10 bitrate= 900.2kbits/
frame=  193 fps= 21 q=31.0 size=     602kB time=00:00:04.63 bitrate=1062.7kbits/
frame=  208 fps= 22 q=30.0 size=     755kB time=00:00:05.13 bitrate=1204.2kbits/
frame=  219 fps= 22 q=30.0 size=     769kB time=00:00:05.50 bitrate=1143.6kbits/
frame=  228 fps= 21 q=30.0 size=     790kB time=00:00:05.80 bitrate=1114.5kbits/
frame=  234 fps= 21 q=31.0 size=     806kB time=00:00:06.00 bitrate=1098.7kbits/
frame=  243 fps= 21 q=31.0 size=     806kB time=00:00:06.30 bitrate=1046.4kbits/
frame=  251 fps= 21 q=31.0 size=     831kB time=00:00:06.57 bitrate=1035.6kbits/
frame=  260 fps= 20 q=31.0 size=     860kB time=00:00:06.87 bitrate=1024.6kbits/
frame=  273 fps= 21 q=31.0 size=     934kB time=00:00:07.30 bitrate=1046.7kbits/
frame=  288 fps= 21 q=30.0 size=    1019kB time=00:00:07.80 bitrate=1068.7kbits/
frame=  302 fps= 21 q=30.0 size=    1066kB time=00:00:08.27 bitrate=1055.8kbits/
frame=  314 fps= 21 q=29.0 size=    1146kB time=00:00:08.67 bitrate=1082.1kbits/
frame=  328 fps= 21 q=28.0 size=    1189kB time=00:00:09.14 bitrate=1065.6kbits/
frame=  341 fps= 21 q=28.0 size=    1247kB time=00:00:09.57 bitrate=1066.7kbits/
frame=  352 fps= 22 q=27.0 size=    1274kB time=00:00:09.94 bitrate=1049.3kbits/
frame=  365 fps= 22 q=27.0 size=    1298kB time=00:00:10.37 bitrate=1024.7kbits/
frame=  376 fps= 22 q=27.0 size=    1349kB time=00:00:10.74 bitrate=1028.7kbits/
frame=  388 fps= 22 q=26.0 size=    1378kB time=00:00:11.14 bitrate=1012.9kbits/
frame=  401 fps= 22 q=26.0 size=    1415kB time=00:00:11.57 bitrate=1001.4kbits/
frame=  412 fps= 22 q=26.0 size=    1454kB time=00:00:11.94 bitrate= 996.9kbits/
frame=  421 fps= 22 q=27.0 size=    1489kB time=00:00:12.24 bitrate= 996.2kbits/
frame=  431 fps= 21 q=27.0 size=    1509kB time=00:00:12.57 bitrate= 982.7kbits/
frame=  441 fps= 21 q=28.0 size=    1555kB time=00:00:12.91 bitrate= 986.6kbits/
frame=  450 fps= 21 q=28.0 size=    1599kB time=00:00:13.21 bitrate= 991.7kbits/
frame=  460 fps= 21 q=28.0 size=    1621kB time=00:00:13.54 bitrate= 980.4kbits/
frame=  470 fps= 21 q=28.0 size=    1660kB time=00:00:13.88 bitrate= 979.9kbits/
frame=  480 fps= 21 q=28.0 size=    1734kB time=00:00:14.21 bitrate= 999.2kbits/
frame=  489 fps= 21 q=29.0 size=    1834kB time=00:00:14.51 bitrate=1035.3kbits/
frame=  499 fps= 21 q=29.0 size=    1890kB time=00:00:14.84 bitrate=1042.8kbits/
frame=  508 fps= 21 q=29.0 size=    1962kB time=00:00:15.14 bitrate=1060.8kbits/
frame=  519 fps= 21 q=29.0 size=    2061kB time=00:00:15.51 bitrate=1087.9kbits/
frame=  531 fps= 21 q=29.0 size=    2189kB time=00:00:15.91 bitrate=1126.6kbits/
frame=  540 fps= 21 q=29.0 size=    2329kB time=00:00:16.21 bitrate=1176.4kbits/
frame=  551 fps= 21 q=29.0 size=    2439kB time=00:00:16.58 bitrate=1204.8kbits/
frame=  562 fps= 21 q=29.0 size=    2569kB time=00:00:16.95 bitrate=1241.8kbits/
frame=  575 fps= 21 q=29.0 size=    2688kB time=00:00:17.38 bitrate=1266.9kbits/
frame=  581 fps= 21 q=29.0 size=    2749kB time=00:00:17.58 bitrate=1280.6kbits/
frame=  589 fps= 21 q=29.0 size=    2785kB time=00:00:17.85 bitrate=1278.1kbits/
frame=  595 fps= 21 q=30.0 size=    2808kB time=00:00:18.05 bitrate=1274.5kbits/
frame=  602 fps= 20 q=30.0 size=    2903kB time=00:00:18.28 bitrate=1300.7kbits/
frame=  610 fps= 20 q=31.0 size=    3008kB time=00:00:18.55 bitrate=1328.2kbits/
frame=  616 fps= 20 q=31.0 size=    3128kB time=00:00:18.75 bitrate=1366.6kbits/
frame=  625 fps= 20 q=31.0 size=    3238kB time=00:00:19.05 bitrate=1392.5kbits/
frame=  633 fps= 20 q=31.0 size=    3320kB time=00:00:19.31 bitrate=1407.9kbits/
frame=  642 fps= 20 q=31.0 size=    3397kB time=00:00:19.61 bitrate=1418.4kbits/
frame=  652 fps= 20 q=31.0 size=    3437kB time=00:00:19.95 bitrate=1411.1kbits/
frame=  661 fps= 20 q=31.0 size=    3511kB time=00:00:20.25 bitrate=1420.3kbits/
frame=  669 fps= 20 q=31.0 size=    3578kB time=00:00:20.52 bitrate=1428.2kbits/
frame=  679 fps= 20 q=31.0 size=    3606kB time=00:00:20.85 bitrate=1416.6kbits/
frame=  691 fps= 20 q=32.0 size=    3670kB time=00:00:21.25 bitrate=1414.5kbits/
frame=  701 fps= 20 q=32.0 size=    3798kB time=00:00:21.58 bitrate=1441.2kbits/
frame=  713 fps= 20 q=32.0 size=    3901kB time=00:00:21.98 bitrate=1453.3kbits/
frame=  723 fps= 20 q=32.0 size=    3969kB time=00:00:22.32 bitrate=1456.6kbits/
frame=  735 fps= 20 q=32.0 size=    4027kB time=00:00:22.72 bitrate=1451.7kbits/
frame=  744 fps= 20 q=32.0 size=    4102kB time=00:00:23.02 bitrate=1459.6kbits/
frame=  755 fps= 20 q=32.0 size=    4135kB time=00:00:23.39 bitrate=1448.3kbits/
frame=  764 fps= 20 q=32.0 size=    4172kB time=00:00:23.69 bitrate=1442.7kbits/
frame=  776 fps= 20 q=32.0 size=    4216kB time=00:00:24.09 bitrate=1433.5kbits/
frame=  787 fps= 20 q=32.0 size=    4254kB time=00:00:24.45 bitrate=1424.8kbits/
frame=  802 fps= 20 q=32.0 size=    4337kB time=00:00:24.95 bitrate=1423.6kbits/
frame=  815 fps= 20 q=32.0 size=    4369kB time=00:00:25.39 bitrate=1409.6kbits/
frame=  828 fps= 20 q=32.0 size=    4450kB time=00:00:25.82 bitrate=1411.5kbits/
frame=  840 fps= 20 q=32.0 size=    4467kB time=00:00:26.22 bitrate=1395.3kbits/
frame=  852 fps= 20 q=32.0 size=    4550kB time=00:00:26.62 bitrate=1399.8kbits/
frame=  865 fps= 20 q=32.0 size=    4594kB time=00:00:27.06 bitrate=1390.7kbits/
frame=  877 fps= 20 q=32.0 size=    4629kB time=00:00:27.46 bitrate=1380.9kbits/
frame=  889 fps= 20 q=32.0 size=    4689kB time=00:00:27.86 bitrate=1378.6kbits/
frame=  900 fps= 20 q=32.0 size=    4740kB time=00:00:28.22 bitrate=1375.6kbits/
frame=  901 fps= 19 q=-1.0 Lsize=    5203kB time=00:00:30.10 bitrate=1416.0kbits
/s
video:4586kB audio:590kB subtitle:0 global headers:0kB muxing overhead 0.532558%

[libx264 @ 000000000264faa0] frame I:8     Avg QP:22.98  size: 31700
[libx264 @ 000000000264faa0] frame P:893   Avg QP:27.55  size:  4974
[libx264 @ 000000000264faa0] mb I  I16..4: 34.6%  0.0% 65.4%
[libx264 @ 000000000264faa0] mb P  I16..4:  0.8%  0.0%  1.5%  P16..4: 41.4% 18.8
%  8.5%  0.0%  0.0%    skip:29.0%
[libx264 @ 000000000264faa0] final ratefactor: 24.50
[libx264 @ 000000000264faa0] coded y,uvDC,uvAC intra: 64.3% 76.0% 36.7% inter: 2
3.5% 19.6% 0.7%
[libx264 @ 000000000264faa0] i16 v,h,dc,p: 34% 33% 11% 22%
[libx264 @ 000000000264faa0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 16% 12%  9% 12%
11% 12%  7%  8%
[libx264 @ 000000000264faa0] i8c dc,h,v,p: 55% 23% 14%  7%
[libx264 @ 000000000264faa0] ref P L0: 72.3% 12.0%  8.1%  3.7%  3.9%
[libx264 @ 000000000264faa0] kb/s:1249.53

但仍然没有运气。.mp4 将在我尝试过的所有兼容设备/浏览器组合中播放，除了 chrome。有什么建议吗？

TIA。

4

4 回答 4

13

解决方法是使用参数“-pix_fmt yuv420p”：

ps>ffmpeg.exe -i $input\$file -y -strict experimental -acodec aac -ac 2 -ab 160k -vcodec libx264 -s 640x480 -pix_fmt yuv420p -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 $output\$file.iphone.mp4

ffmpeg 版本N-46936-g8b6aeb1

希望这可以帮助您获得与 chrome 兼容的视频

更新1

请参阅参考它可能对您有所帮助

于 2013-06-29T12:44:34.423 回答
2

另一个错误来源可能是视频的传输，而不是解码。

尝试使用“file://...” url 打开那些不起作用的：如果有效，则问题出在传输上，与 h264 或 mp4 无关。

尽管当以 html5 托管时，两个给定的文件在我的 Chrome 中都可以正常播放，但我发现更大的 mp4 文件存在这样的传输问题。在这种情况下，我可以在提琴手中看到取消的请求。

这似乎是 Chrome 中的一个错误，我还没有找到解决方法。

于 2014-10-16T15:11:46.807 回答
1

Chrome 可能正在使用某些 H.264 视频驱动程序加速，这可能会在旧驱动程序上中断...尝试更新视频驱动程序并查看它是否有效。

于 2013-08-12T17:41:54.820 回答
0

请尝试以下方法，我在 Chrome 中获取 mp4 文件时也遇到了一些麻烦。在我的情况下，即使我将 mp4 文件拖放到 chrome 中，mp4 文件也无法正常工作。我希望你有同样的问题。第一步你的 mp4 文件应该用 H.264 编码。就我而言，我必须更改以下设置：-

输入 Chrome://flags

搜索以下内容：-

禁用硬件加速视频解码。

通过选择禁用选项禁用上述设置

重新启动浏览器。

检查 Chrome 是否现在播放 mp4 文件。如果是，那么 HTML 视频也应该可以正常工作。

于 2013-07-04T12:13:20.933 回答