bash-4.2$ ffmpeg -v verbose -f lavfi -i "amovie=04\ Wish\ You\ Were\ Here.flac, asplit[out0],showspectrum=s=1920X1080[out1]" -r 24 -f image2 test/image-%3d.jpeg
ffmpeg version N-45834-g8c2dbc3 Copyright (c) 2000-2012 the FFmpeg developers
  built on Oct 21 2012 21:44:46 with gcc 4.7.1 (GCC)
  configuration: --enable-shared --enable-gpl --enable-version3 --enable-nonfree --disable-runtime-cpudetect --disable-doc --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-avdevice --enable-avcodec --enable-avformat --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --disable-w32threads --disable-os2threads --enable-x11grab --enable-network --enable-dct --enable-dwt --enable-lsp --enable-mdct --enable-rdft --enable-fft --disable-dxva2 --enable-vaapi --enable-vda --enable-vdpau --disable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --disable-libaacplus --enable-libass --disable-libbluray --disable-libcaca --disable-libcelt --enable-libcdio --enable-libdc1394 --enable-libfaac --disable-libfdk-aac --disable-libflite --enable-libfreetype --enable-libgsm --disable-libiec61883 --disable-libilbc --disable-libmodplug --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-  libavutil      51. 76.101 / 51. 76.101
  libavcodec     54. 68.100 / 54. 68.100
  libavformat    54. 33.100 / 54. 33.100
  libavdevice    54.  3.100 / 54.  3.100
  libavfilter     3. 20.102 /  3. 20.102
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 16.100 /  0. 16.100
  libpostproc    52.  1.100 / 52.  1.100
[flac @ 0x1b1fb80] max_analyze_duration 5000000 reached at 5015510
[Parsed_amovie_0 @ 0x1b1fac0] seek_point:0 format_name:(null) file_name:04 Wish You Were Here.flac stream_index:-1
[Parsed_showspectrum_2 @ 0x1b24b00] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_asplit_1' and the filter 'Parsed_showspectrum_2'
[auto-inserted resampler 0 @ 0x1b0e800] chl:stereo fmt:s16 r:44100Hz -> chl:stereo fmt:s16p r:44100Hz
[Parsed_showspectrum_2 @ 0x1b24b00] s:1920x1080 RDFT window size:4096
[lavfi @ 0x1b0b900] Stream #0: not enough frames to estimate rate; consider increasing probesize
[lavfi @ 0x1b0b900] Stream #1: not enough frames to estimate rate; consider increasing probesize
[lavfi @ 0x1b0b900] Estimating duration from bitrate, this may be inaccurate
Input #0, lavfi, from 'amovie=04\ Wish\ You\ Were\ Here.flac, asplit[out0],showspectrum=s=1920X1080[out1]':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
    Stream #0:1: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1920x1080 [SAR 1:1 DAR 16:9], 44100 tbr, 44100 tbn, 44100 tbc
[graph 0 input from stream 0:1 @ 0x1b0df60] w:1920 h:1080 pixfmt:rgb24 tb:1/44100 fr:44100/1 sar:1/1 sws_param:flags=2
[format @ 0x1b9d460] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
[auto-inserted scaler 0 @ 0x1b9dbc0] w:1920 h:1080 fmt:rgb24 sar:1/1 -> w:1920 h:1080 fmt:yuvj420p sar:1/1 flags:0x4
Output #0, image2, to 'test/image-%3d.jpeg':
  Metadata:
    encoder         : Lavf54.33.100
    Stream #0:0: Video: mjpeg, yuvj420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 24 tbc
Stream mapping:
  Stream #0:1 -> #0:0 (rawvideo -> mjpeg)
Press [q] to stop, [?] for help
*** 1 dup!
[image2 @ 0x1b0d960] Could not open file : test/image-001.jpeg
av_interleaved_write_frame(): Input/output error
bash-4.2$