I'm trying to put together a slide show using imagemagick and FFMPEG.  I use imagemagick to expand a single photo into 30fps video (imagemagick also handles things like putting some text captions on the frames along the way).  When I go to let ffmpeg digest it into a video it clips along nicely on the color parts of the video, but when it gets to a black and white section it reports "frame= 2030 fps=102 q=32766.0 Lsize=    5203kB time=00:01:07.60 bitrate= 630.5kbits/s dup=0 drop=703" and drops every frame of video until it hits something with color.  As you can imagine this results in entire photos being removed from the slideshow.
Here is my latest dump...
ffmpeg -y -r 30 -i "teststream/%06d.jpg" -c:v libx264 -r 30 newffmpeg.mp4
  ffmpeg version git-2012-12-10-c3bb333 Copyright (c) 2000-2012 the FFmpeg developers
    built on Dec 10 2012 22:02:04 with gcc 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
    configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3
    libavutil      52. 12.100 / 52. 12.100
    libavcodec     54. 79.101 / 54. 79.101
    libavformat    54. 49.100 / 54. 49.100
    libavdevice    54.  3.102 / 54.  3.102
    libavfilter     3. 26.101 /  3. 26.101
    libswscale      2.  1.103 /  2.  1.103
    libswresample   0. 17.102 /  0. 17.102
    libpostproc    52.  2.100 / 52.  2.100
  Input #0, image2, from 'teststream/%06d.jpg':
    Duration: 00:12:02.80, start: 0.000000, bitrate: N/A
      Stream #0:0: Video: mjpeg, yuvj444p, 720x480 [SAR 72:72 DAR 3:2], 25 fps, 25 tbr, 25 tbn, 25 tbc
  [libx264 @ 0x3450140] using SAR=1/1
  [libx264 @ 0x3450140] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
  [libx264 @ 0x3450140] profile High, level 3.0
  [libx264 @ 0x3450140] 264 - core 129 r2 1cffe9f - 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=12 lookahead_threads=2 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=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  Output #0, mp4, to 'newffmpeg.mp4':
    Metadata:
      encoder         : Lavf54.49.100
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuvj420p, 720x480 [SAR 1:1 DAR 3:2], q=-1--1, 15360 tbn, 30 tbc
  Stream mapping:
    Stream #0:0 - #0:0 (mjpeg - libx264)
  Press [q] to stop, [?] for help
  Input stream #0:0 frame changed from size:720x480 fmt:yuvj444p to size:720x480 fmt:yuvj422p
  Input stream #0:0 frame changed from size:720x480 fmt:yuvj422p to size:720x480 fmt:yuvj444pp=584
  frame= 2030 fps=102 q=32766.0 Lsize=    5203kB time=00:01:07.60 bitrate= 630.5kbits/s dup=0 drop=703
  video:5179kB audio:0kB subtitle:0 global headers:0kB muxing overhead 0.472425%
  [libx264 @ 0x3450140] frame I:9     Avg QP:20.10  size: 33933
  [libx264 @ 0x3450140] frame P:636   Avg QP:24.12  size:  6737
  [libx264 @ 0x3450140] frame B:1385  Avg QP:27.04  size:   514
  [libx264 @ 0x3450140] consecutive B-frames:  2.5% 15.2% 13.2% 69.2%
  [libx264 @ 0x3450140] mb I  I16..4:  8.3% 80.3% 11.5%
  [libx264 @ 0x3450140] mb P  I16..4:  1.5%  2.5%  0.2%  P16..4: 41.7% 18.0% 10.3%  0.0%  0.0%    skip:25.9%
  [libx264 @ 0x3450140] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8: 26.6%  0.6%  0.1%  direct: 0.2%  skip:72.3%  L0:35.0% L1:60.3% BI: 4.7%
  [libx264 @ 0x3450140] 8x8 transform intra:64.1% inter:75.1%
  [libx264 @ 0x3450140] coded y,uvDC,uvAC intra: 51.6% 78.0% 43.7% inter: 10.6% 14.9% 2.1%
  [libx264 @ 0x3450140] i16 v,h,dc,p: 29% 19%  6% 46%
  [libx264 @ 0x3450140] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 15% 17%  5%  9% 10%  7%  8%  6%
  [libx264 @ 0x3450140] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 18% 11%  5%  9% 10%  6%  6%  4%
  [libx264 @ 0x3450140] i8c dc,h,v,p: 46% 18% 24% 12%
  [libx264 @ 0x3450140] Weighted P-Frames: Y:20.1% UV:18.7%
  [libx264 @ 0x3450140] ref P L0: 59.2% 23.2% 13.1%  4.3%  0.2%
  [libx264 @ 0x3450140] ref B L0: 88.7%  8.3%  3.0%
  [libx264 @ 0x3450140] ref B L1: 95.0%  5.0%
  [libx264 @ 0x3450140] kb/s:626.88
  Received signal 2: terminating.
One last note:  If I remove the -r 30 from the input and output it works flawlessly.  I have no idea why the -r 30 is causing it to freak out.