[FFmpeg-user] questions about audio filter "atempo"

[韩瑞松]

Why did I get a "Segmentation fault"?
I used this command line:
ffmpeg -y -i youku.mp4 -analyzeduration 2G -vcodec libx264 -b 512k -r 25 -s 576x312 -aspect 576:312 -psnr -acodec libfaac -ab 64k -ar 44100 -ac 2 -vf "movie=2.jpg,scale=100:100[logo];[in][logo]overlay=5:5[out]" -af atempo=2 -f flv -map_chapters -1 -g 50 youku.mp4.flv
it's output:


ffmpeg version git-2012-07-18-56ae592 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jul 18 2012 11:12:33 with gcc 4.4.3
  configuration: --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-libx264 --enable-libmp3lame --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvorbis --enable-libtheora --enable-shared --enable-ffplay --enable-libxvid --enable-libvpx
  libavutil      51. 65.100 / 51. 65.100
  libavcodec     54. 41.100 / 54. 41.100
  libavformat    54. 17.100 / 54. 17.100
  libavdevice    54.  1.100 / 54.  1.100
  libavfilter     3.  2.100 /  3.  2.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'youku.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isomavc1
    creation_time   : 1941-02-22 02:53:21
  Duration: 00:06:01.48, start: 0.000000, bitrate: 592 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 576x312 [SAR 577:576 DAR 577:312], 557 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
    Metadata:
      creation_time   : 1941-02-22 02:53:21
      handler_name    : GPAC ISO Video Handler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 32 kb/s
    Metadata:
      creation_time   : 1941-02-22 02:53:27
      handler_name    : GPAC ISO Audio Handler
Please use -b:a or -b:v, -b is ambiguous
[libx264 @ 0x99efa00] --psnr used with psy on: results will be invalid!
[libx264 @ 0x99efa00] --tune psnr should be used if attempting to benchmark psnr!
[libx264 @ 0x99efa00] using SAR=1/1
[libx264 @ 0x99efa00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
[libx264 @ 0x99efa00] profile High, level 2.1
[libx264 @ 0x99efa00] 264 - core 125 r2 5f615f7 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'youku.mp4.flv':
  Metadata:
    major_brand     : isom
    minor_version   : 1
    compatible_brands: isomavc1
    encoder         : Lavf54.17.100
    Stream #0:0(und): Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 576x312 [SAR 1:1 DAR 24:13], q=-1--1, 512 kb/s, 1k tbn, 25 tbc
    Metadata:
      creation_time   : 1941-02-22 02:53:21
      handler_name    : GPAC ISO Video Handler
    Stream #0:1(und): Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, stereo, s16, 64 kb/s
    Metadata:
      creation_time   : 1941-02-22 02:53:27
      handler_name    : GPAC ISO Audio Handler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (aac -> libfaac)
Press [q] to stop, [?] for help
Segmentation fault




How to use the audio filter "atempo"? 


But when I tried this on a amd64 server ,I succeeded