我对这个命令有疑问（FFMPEG PHP）：
命令：
ffmpeg -i 62f76f050494f0ed6a5997967c00c0c0.wmv -ss 0 -t 99 -y -ar 44100 -async 44100 -r 29.970 -ac 2 -qscale 5 -f flv 62f76f050494f0ed6a5997967c00c0c0.flv
输出：
FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.72. 2 / 52.72. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libavfilter 1.19. 0 / 1.19. 0
libswscale 0.11. 0 / 0.11. 0
libpostproc 51. 2. 0 / 51. 2. 0
[asf @ 0xe81670]max_analyze_duration reached
Input #0, asf, from '/var/www/resources/tmp/62f76f050494f0ed6a5997967c00c0c0.wmv':
Metadata:
WMFSDKVersion : 12.0.7601.17514
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
Duration: 00:00:50.87, bitrate: 2467 kb/s
Stream #0.0: Audio: wmapro, 44100 Hz, stereo, flt, 256 kb/s
Stream #0.1: Video: vc1, yuv420p, 950x460 [PAR 1:1 DAR 95:46], 25 fps, 25 tbr, 1k tbn, 25 tbc
Output #0, flv, to '/var/www/resources/media/62f76f050494f0ed6a5997967c00c0c0.flv':
Metadata:
encoder : Lavf52.64.2
Stream #0.0: Video: flv, yuv420p, 950x460 [PAR 1:1 DAR 95:46], q=2-31, 200 kb/s, 1k tbn, 29.97 tbc
Stream #0.1: Audio: libmp3lame, 11025 Hz, stereo, s16, 64 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Stream #0.0 -> #0.1
Press [q] to stop encoding
frame= 72 fps= 0 q=5.0 size= 0kB time=10.91 bitrate= 0.0kbits/s
Multiple frames in a packet from stream 0
Warning, using s16 intermediate sample format for resampling
frame= 141 fps=139 q=5.0 size= 103kB time=8.15 bitrate= 103.2kbits/s
frame= 220 fps=144 q=5.0 size= 875kB time=10.92 bitrate= 656.6kbits/s
frame= 290 fps=143 q=5.0 size= 1525kB time=13.74 bitrate= 909.1kbits/s
frame= 356 fps=141 q=5.0 size= 2153kB time=15.99 bitrate=1103.1kbits/s
frame= 427 fps=141 q=5.0 size= 2847kB time=18.70 bitrate=1247.0kbits/s
frame= 497 fps=141 q=5.0 size= 3771kB time=21.16 bitrate=1460.0kbits/s
frame= 575 fps=142 q=5.0 size= 4695kB time=24.61 bitrate=1563.0kbits/s
frame= 639 fps=141 q=5.0 size= 5301kB time=26.80 bitrate=1620.2kbits/s
frame= 703 fps=139 q=5.0 size= 5829kB time=29.36 bitrate=1626.2kbits/s
frame= 774 fps=139 q=5.0 size= 6659kB time=32.39 bitrate=1684.0kbits/s
frame= 842 fps=139 q=5.0 size= 7915kB time=35.27 bitrate=1838.6kbits/s
frame= 911 fps=139 q=5.0 size= 9011kB time=37.98 bitrate=1943.4kbits/s
frame= 975 fps=138 q=5.0 size= 9788kB time=40.59 bitrate=1975.3kbits/s
frame= 1041 fps=138 q=5.0 size= 10904kB time=43.83 bitrate=2037.9kbits/s
frame= 1115 fps=138 q=5.0 size= 11795kB time=46.24 bitrate=2089.8kbits/s
frame= 1183 fps=138 q=5.0 size= 12678kB time=48.74 bitrate=2130.7kbits/s
frame= 1247 fps=137 q=5.0 size= 13964kB time=51.36 bitrate=2227.5kbits/s
frame= 1271 fps=136 q=5.0 Lsize= 15865kB time=58.86 bitrate=2208.1kbits/s
video:15366kB audio:462kB global headers:0kB muxing overhead 0.238956%
问题：
Warning, using s16 intermediate sample format for resampling
我也尝试过改变参数
从
-ar 44100
到
-ar 11025
谢谢！
解决方案：
阅读此链接：