【发布时间】：2015-08-05 07:46:39
【问题描述】：
我想要简单的命令将任何支持的文件转换为几乎没有视频压缩的任何文件。
例如
avi to mp4
mp4 to 3gp
.
.etc..
我试过下面的代码
ffmpeg -i infile.flv outfile.3gp
它适用于某些人，但对于其他一些人，例如flv to 3gp 转换，它会引发如下错误，并且输出文件大小比输入文件大。
"Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height"
P:s 我用下面的库编译
./configure --enable-version3 --enable-libopencore-amrnb --enable-libvo-aacenc --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-postproc --enable-nonfree
完整回复
array(48) {
[0]=>
string(77) "ffmpeg version N-72286-gd9b264b Copyright (c) 2000-2015 the FFmpeg developers"
[1]=>
string(56) " built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)"
[2]=>
string(261) " configuration: --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvpx --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --enable-gpl --enable-postproc --enable-nonfree"
[3]=>
string(40) " libavutil 54. 23.101 / 54. 23.101"
[4]=>
string(40) " libavcodec 56. 39.101 / 56. 39.101"
[5]=>
string(40) " libavformat 56. 33.101 / 56. 33.101"
[6]=>
string(40) " libavdevice 56. 4.100 / 56. 4.100"
[7]=>
string(40) " libavfilter 5. 16.101 / 5. 16.101"
[8]=>
string(40) " libswscale 3. 1.101 / 3. 1.101"
[9]=>
string(40) " libswresample 1. 1.100 / 1. 1.100"
[10]=>
string(40) " libpostproc 53. 3.100 / 53. 3.100"
[11]=>
string(32) "Input #0, flv, from 'video.flv':"
[12]=>
string(11) " Metadata:"
[13]=>
string(25) " major_brand : M4V"
[14]=>
string(23) " minor_version : 1"
[15]=>
string(39) " compatible_brands: M4V M4A mp42isom"
[16]=>
string(26) " date : 2008"
[17]=>
string(71) " copyright : © 2008 Blender Foundation | www.bigbuckbunny.org"
[18]=>
string(36) " title : Big Buck Bunny"
[19]=>
string(43) " artist : Peach Open Movie Team"
[20]=>
string(56) " composer : Sacha Goedegebure / Ton Roosendaal"
[21]=>
string(35) " encoder : Lavf55.33.100"
[22]=>
string(59) " Duration: 00:09:56.58, start: 0.058000, bitrate: 663 kb/s"
[23]=>
string(88) " Stream #0:0: Video: h264 (High), yuv420p, 640x360, 24.42 fps, 24 tbr, 1k tbn, 48 tbc"
[24]=>
string(61) " Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s"
[25]=>
string(90) "[h263 @ 0x1ef5f60] The specified picture size of 640x360 is not valid for the H.263 codec."
[26]=>
string(77) "Valid sizes are 128x96, 176x144, 352x288, 704x576, and 1408x1152. Try H.263+."
[27]=>
string(33) "Output #0, 3gp, to 'outfile.3gp':"
[28]=>
string(11) " Metadata:"
[29]=>
string(25) " major_brand : M4V"
[30]=>
string(23) " minor_version : 1"
[31]=>
string(39) " compatible_brands: M4V M4A mp42isom"
[32]=>
string(26) " date : 2008"
[33]=>
string(71) " copyright : © 2008 Blender Foundation | www.bigbuckbunny.org"
[34]=>
string(36) " title : Big Buck Bunny"
[35]=>
string(43) " artist : Peach Open Movie Team"
[36]=>
string(56) " composer : Sacha Goedegebure / Ton Roosendaal"
[37]=>
string(35) " encoder : Lavf55.33.100"
[38]=>
string(60) " Stream #0:0: Video: h263, none, q=2-31, 128 kb/s, 24 fps"
[39]=>
string(13) " Metadata:"
[40]=>
string(42) " encoder : Lavc56.39.101 h263"
[41]=>
string(52) " Stream #0:1: Audio: amr_nb, 0 channels, 128 kb/s"
[42]=>
string(13) " Metadata:"
[43]=>
string(55) " encoder : Lavc56.39.101 libopencore_amrnb"
[44]=>
string(15) "Stream mapping:"
[45]=>
string(54) " Stream #0:0 -> #0:0 (h264 (native) -> h263 (native))"
[46]=>
string(66) " Stream #0:1 -> #0:1 (mp3 (native) -> amr_nb (libopencore_amrnb))"
[47]=>
string(119) "Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height"
}
【问题讨论】：
-
如果您列出了失败案例的完整 ffmpeg 日志，将会有所帮助。
-
我明白了吗？为什么还有很多其他 ffmpeg 问题以及为什么 ffmpeg 标签甚至存在？
标签： linux ffmpeg centos command