$ ffmpeg -v 9 -loglevel 99 -i big_buck_bunny.mp4 test.swf
ffmpeg version N-49844-g1ac0fa5 Copyright (c) 2000-2013 the FFmpeg developers
  built on Feb 12 2013 17:42:46 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 17.101 / 52. 17.101
  libavcodec     54. 91.103 / 54. 91.103
  libavformat    54. 63.100 / 54. 63.100
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 37.101 /  3. 37.101
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set libav* logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set libav* logging level) with argument '99'.
Reading option '-i' ... matched as input file with argument 'big_buck_bunny.mp4'.
Reading option 'test.swf' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set libav* logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input file big_buck_bunny.mp4.
Successfully parsed a group of options.
Opening an input file: big_buck_bunny.mp4.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0204c6a0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0204c6a0] ISO: File Type Major Brand: mp42
[mov,mp4,m4a,3gp,3g2,mj2 @ 0204c6a0] File position before avformat_find_stream_info() is 37114
[mov,mp4,m4a,3gp,3g2,mj2 @ 0204c6a0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0204c6a0] File position after avformat_find_stream_info() is 73594
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'big_buck_bunny.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: mp42avc1
    creation_time   : 2010-02-09 01:55:39
  Duration: 00:01:00.10, start: 0.000000, bitrate: 733 kb/s
    Stream #0:0(eng), 11, 1/22050: Audio: aac (mp4a / 0x6134706D), 22050 Hz, stereo, fltp, 65 kb/s
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : Apple Sound Media Handler
    Stream #0:1(eng), 1, 1/600: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360, 1/1200, 612 kb/s, 23.96 fps, 24 tbr, 600 tbn, 1200 tbc
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : Apple Video Media Handler
    Stream #0:2(eng), 0, 1/90000: Data: none (rtp  / 0x20707472), 0/1, 45 kb/s
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : hint media handler
    Stream #0:3(eng), 0, 1/22050: Data: none (rtp  / 0x20707472), 0/1, 5 kb/s
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : hint media handler
Successfully opened the file.
Parsing a group of options: output file test.swf.
Successfully parsed a group of options.
Opening an output file: test.swf.
Successfully opened the file.
[buffer @ 03343fe0] Setting entry with key 'video_size' to value '640x360'
[buffer @ 03343fe0] Setting entry with key 'pix_fmt' to value '0'
[buffer @ 03343fe0] Setting entry with key 'time_base' to value '1/600'
[buffer @ 03343fe0] Setting entry with key 'pixel_aspect' to value '0/1'
[buffer @ 03343fe0] Setting entry with key 'sws_param' to value 'flags=2'
[buffer @ 03343fe0] Setting entry with key 'frame_rate' to value '24/1'
[graph 0 input from stream 0:1 @ 0204b4c0] w:640 h:360 pixfmt:yuv420p tb:1/600 fr:24/1 sar:0/1 sws_param:flags=2
[abuffer @ 03344060] Setting entry with key 'time_base' to value '1/22050'
[abuffer @ 03344060] Setting entry with key 'sample_rate' to value '22050'
[abuffer @ 03344060] Setting entry with key 'sample_fmt' to value 'fltp'
[abuffer @ 03344060] Setting entry with key 'channel_layout' to value '0x3'
[graph 1 input from stream 0:0 @ 03341fe0] tb:1/22050 samplefmt:fltp samplerate:22050 chlayout:0x3
[aformat @ 0204bca0] Setting entry with key 'sample_fmts' to value 's32p,fltp,s16p'
[aformat @ 0204bca0] Setting entry with key 'sample_rates' to value '44100,48000,32000,22050,24000,16000,11025,12000,8000'
[aformat @ 0204bca0] Setting entry with key 'channel_layouts' to value '0x4,0x3'
[flv @ 0333aa20] intra_quant_bias = 0 inter_quant_bias = -64
[h264 @ 02043340] detected 4 logical cores
Output #0, swf, to 'test.swf':
  Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: mp42avc1
    encoder         : Lavf54.63.100
    Stream #0:0(eng), 0, 1/90000: Video: flv1, yuv420p, 640x360, 1/24, q=2-31, 200 kb/s, 90k tbn, 24 tbc
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : Apple Video Media Handler
    Stream #0:1(eng), 0, 1/90000: Audio: mp3, 22050 Hz, stereo, fltp
    Metadata:
      creation_time   : 2010-02-09 01:55:39
      handler_name    : Apple Sound Media Handler
Stream mapping:
  Stream #0:1 -> #0:0 (h264 -> flv)
  Stream #0:0 -> #0:1 (aac -> libmp3lame)
Press [q] to stop, [?] for help
EOF on sink link output stream 0:0:default.time=00:00:57.39 bitrate= 339.3kbits/s
[output stream 0:1 @ 03342040] EOF on sink link output stream 0:1:default.
No more output streams to write to, finishing.
[libmp3lame @ 0333b020] Trying to remove 495 more samples than there are in the queue
frame= 1440 fps=552 q=31.0 Lsize=    2469kB time=00:01:00.16 bitrate= 336.1kbits/s
video:1959kB audio:470kB subtitle:0 global headers:0kB muxing overhead 1.622427%
[AVIOContext @ 0204b5c0] Statistics: 5510872 bytes read, 0 seeks