cheese:Desktop jeff$ ffmpeg -loop 1 -r 5 -i test.jpg -c:v libx264 -preset slow -tune stillimage -crf 24 -t 10 output.mp4
ffmpeg version N-37801-gc15f3bd Copyright (c) 2000-2012 the FFmpeg developers
  built on Feb 12 2012 15:33:05 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
  configuration: --arch=x86_64 --enable-libmp3lame --enable-shared --disable-mmx --disable-stripping --enable-debug --enable-gpl --enable-libx264 --enable-nonfree --enable-libvorbis --enable-libxvid --enable-version3 --enable-pthreads --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libxvid --enable-x11grab --enable-ffplay --enable-libfreetype
  libavutil      51. 39.100 / 51. 39.100
  libavcodec     54.  1.100 / 54.  1.100
  libavformat    54.  0.100 / 54.  0.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 62.100 /  2. 62.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
  libpostproc    52.  0.100 / 52.  0.100
[image2 @ 0x7fb97b01ae00] max_analyze_duration 5000000 reached at 5000000
Input #0, image2, from 'test.jpg':
  Duration: 00:00:00.20, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj444p, 350x350 [SAR 100:100 DAR 1:1], 5 fps, 5 tbr, 5 tbn, 5 tbc
Incompatible pixel format 'yuvj444p' for codec 'libx264', auto-selecting format 'yuvj420p'
[buffer @ 0x7fb97ac16380] w:350 h:350 pixfmt:yuvj444p tb:1/1000000 sar:100/100 sws_param:
[buffersink @ 0x7fb97ac16570] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out'
[scale @ 0x7fb97ac167d0] w:350 h:350 fmt:yuvj444p -> w:350 h:350 fmt:yuvj420p flags:0x4
[libx264 @ 0x7fb97b01d800] using SAR=1/1
[libx264 @ 0x7fb97b01d800] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 0x7fb97b01d800] profile High, level 2.1
[libx264 @ 0x7fb97b01d800] 264 - core 120 r2164 da19765 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:-3:-3 analyse=0x3:0x113 me=umh subme=8 psy=1 psy_rd=2.00:0.70 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-4 threads=6 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=24.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.20
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf54.0.100
    Stream #0:0: Video: h264 (![0][0][0] / 0x0021), yuvj420p, 350x350 [SAR 1:1 DAR 1:1], q=-1--1, 5 tbn, 5 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg -> libx264)
Press [q] to stop, [?] for help
frame=   50 fps=  0 q=32766.0 Lsize=      49kB time=00:00:09.60 bitrate=  41.7kbits/s
video:48kB audio:0kB global headers:0kB muxing overhead 2.049858%
[libx264 @ 0x7fb97b01d800] frame I:1     Avg QP:13.92  size: 47164
[libx264 @ 0x7fb97b01d800] frame P:49    Avg QP:26.71  size:    23
[libx264 @ 0x7fb97b01d800] mb I  I16..4: 31.8% 54.1% 14.0%
[libx264 @ 0x7fb97b01d800] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0%  0.0%  0.0%  0.0%    skip:100.0%
[libx264 @ 0x7fb97b01d800] 8x8 transform intra:54.1% inter:75.0%
[libx264 @ 0x7fb97b01d800] coded y,uvDC,uvAC intra: 62.9% 70.2% 69.8% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x7fb97b01d800] i16 v,h,dc,p: 86%  3% 11%  0%
[libx264 @ 0x7fb97b01d800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 10% 14% 10% 12%  9% 10% 12% 12%
[libx264 @ 0x7fb97b01d800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  6% 11% 16%  9% 10% 11% 10% 11% 15%
[libx264 @ 0x7fb97b01d800] i8c dc,h,v,p: 73%  9% 10%  8%
[libx264 @ 0x7fb97b01d800] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fb97b01d800] ref P L0: 75.0%  0.0% 25.0%
[libx264 @ 0x7fb97b01d800] kb/s:38.61
cheese:Desktop jeff$