转换视频使用FFMPEG的Android [英] Converting Video for Android using FFMPEG
问题描述
我所试图做的是视频转换成MP4格式，将在Android的播放。
What i am trying to do is convert video into mp4 format that will play in Android.
我通过<一个了href="http://developer.android.com/guide/appendix/media-formats.html">http://developer.android.com/guide/appendix/media-formats.html
我设置下面的选项
-v codeC libx264 -vprofile基准-a codeC libfaac -ar 44100 -ac 1 -ab 128K但我得到错误信息对不起，这个视频是无效的流此设备
-vcodec libx264 -vprofile baseline -acodec libfaac -ar 44100 -ac 1 -ab 128k yet I get the error message "Sorry, This Video is not valid for streaming to this device"
我在使用Android浏览器播放的视频videoJS HTTP：//video-js.zencoder.com /海洋-clip.mp4 ，并能正常工作。
I Played the video in android browser using videoJS http://video-js.zencoder.com/oceans-clip.mp4 and it WORKS fine.
我下载的视频与海洋clip.mp4并试图用简约的选项来转换
I download the video oceans-clip.mp4 and tried to convert using minimalist options
-y -i working.mp4 -vprofile基线pleasework.mp4
-y -i working.mp4 -vprofile baseline pleasework.mp4
但我得到同样的错误消息。
yet I get the same error message.
下面是视频文件的FFmpeg的信息转储
The following is the FFMPEG info dump of the video files
Working.mp4
Array
(
[0] => ffmpeg version N-40229-g24e3f44-syslint Copyright (c) 2000-2012 the FFmpeg developers
[1] => built on Apr 29 2012 22:01:41 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
[2] => configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
[3] => libavutil 51. 48.100 / 51. 48.100
[4] => libavcodec 54. 17.101 / 54. 17.101
[5] => libavformat 54. 3.100 / 54. 3.100
[6] => libavdevice 53. 4.100 / 53. 4.100
[7] => libavfilter 2. 72.100 / 2. 72.100
[8] => libswscale 2. 1.100 / 2. 1.100
[9] => libswresample 0. 11.100 / 0. 11.100
[10] => libpostproc 52. 0.100 / 52. 0.100
[11] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'working.mp4':
[12] => Metadata:
[13] => major_brand : isom
[14] => minor_version : 1
[15] => compatible_brands: isomavc1
[16] => creation_time : 2010-05-18 04:24:00
[17] => Duration: 00:00:46.54, start: 0.000000, bitrate: 3342 kb/s
[18] => Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x264 [SAR 132:133 DAR 320:133], 3195 kb/s, SAR 127:128 DAR 635:264, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
[19] => Metadata:
[20] => creation_time : 2010-05-18 04:24:00
[21] => handler_name : GPAC ISO Video Handler
[22] => Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 144 kb/s
[23] => Metadata:
[24] => creation_time : 2010-05-18 04:24:01
[25] => handler_name : GPAC ISO Audio Handler
[26] => At least one output file must be specified
)
不Working.mp4
Array
(
[0] => ffmpeg version N-40229-g24e3f44-syslint Copyright (c) 2000-2012 the FFmpeg developers
[1] => built on Apr 29 2012 22:01:41 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
[2] => configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
[3] => libavutil 51. 48.100 / 51. 48.100
[4] => libavcodec 54. 17.101 / 54. 17.101
[5] => libavformat 54. 3.100 / 54. 3.100
[6] => libavdevice 53. 4.100 / 53. 4.100
[7] => libavfilter 2. 72.100 / 2. 72.100
[8] => libswscale 2. 1.100 / 2. 1.100
[9] => libswresample 0. 11.100 / 0. 11.100
[10] => libpostproc 52. 0.100 / 52. 0.100
[11] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pleasework.mp4':
[12] => Metadata:
[13] => major_brand : isom
[14] => minor_version : 512
[15] => compatible_brands: isomiso2avc1mp41
[16] => creation_time : 2010-05-18 04:24:00
[17] => encoder : Lavf54.3.100
[18] => Duration: 00:00:46.54, start: 0.000000, bitrate: 1843 kb/s
[19] => Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x264 [SAR 127:128 DAR 635:264], 1715 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
[20] => Metadata:
[21] => creation_time : 2010-05-18 04:24:00
[22] => handler_name : VideoHandler
[23] => Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 124 kb/s
[24] => Metadata:
[25] => creation_time : 2010-05-18 04:24:00
[26] => handler_name : SoundHandler
[27] => At least one output file must be specified
)
元数据看起来几乎是一样的但它似乎并没有在Android的播放。任何帮助AP preciated。
The metadata looks almost the same yet it doesn't seem to play in android. Any help appreciated.
推荐答案
通过创建的ffmpeg的MP4有尾部的MOOV头。这就是为什么您收到此错误信息。 ffmpeg的可以把前面的MOOV头（适用于流媒体）。
The MP4 created by ffmpeg has the moov header at the tail. That is why you are getting this error message. ffmpeg can put the moov header in front (suitable for streaming).
只需运行：
ffmpeg -i <input> -c:v libx264 -profile:v baseline -c:a libfaac -ar 44100 -ac 2 -b:a 128k -movflags faststart output.mp4
另请参阅<一个href="http://stackoverflow.com/questions/8061798/post-processing-in-ffmpeg-to-move-moov-atom-in-mp4-files-qt-faststart">Post在ffmpeg的处理移动MOOV原子的MP4文件（QT-的fastStart）
这篇关于转换视频使用FFMPEG的Android的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
