Błąd synchronizacji Ffmpeg, pierwszy obraz wyświetlany bardzo szybko

Chcę przekonwertować moje obrazy za pomocą plików mp3 na filmy ... ale pierwszy slajd wyświetla się naprawdę szybko.

Chcę, aby każdy czas trwania slajdu wynosił około 5-7 sekund

Materiał RAW

• Pliki MP3
• Moja lista Obrazy
• FFmpeg git-7e5c5fa 32-bitowy statyczny (najnowszy) (2013-01-10)

Oto moje polecenie

ffmpeg  -r 1/7 -i "manga%01d.png" -i "sound1.mp3" -c:a aac -strict experimental -b:a 128k -map 0:0 -map 1:0 -shortest -r 27 -y "product000.mp4"

LOG:

ffmpeg version N-48731-g7e5c5fa Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 10 2013 19:47:49 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-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib --enable-filter=frei0r
  libavutil      52. 13.100 / 52. 13.100
  libavcodec     54. 86.100 / 54. 86.100
  libavformat    54. 59.107 / 54. 59.107
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 32.100 /  3. 32.100
  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 'manga%01d.png':
  Duration: 00:00:00.32, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgba, 640x360 [SAR 2835:2835 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
[mp3 @ 02845880] max_analyze_duration 5000000 reached at 5015510
[mp3 @ 02845880] Estimating duration from bitrate, this may be inaccurate
Input #1, mp3, from 'sound1.mp3':
  Metadata:
    TSS             : Logic Pro 8.0.2
    genre           : Electronic
    TCM             : Kevin MacLeod
    album           : Disco and Lounge
    TKE             : C
    TBP             : 95
    title           : One Sly Move
    artist          : Kevin MacLeod
    date            : 2008-10-23 01:31
  Duration: 00:02:44.69, start: 0.000000, bitrate: 320 kb/s
    Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 320 kb/s
    Stream #1:1: Video: mjpeg, yuvj444p, 400x400, 90k tbr, 90k tbn, 90k tbc
    Metadata:
      title           : ÿØÿà
      comment         : Other
[libx264 @ 024c6e00] using SAR=1/1
[libx264 @ 024c6e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 024c6e00] profile High, level 3.0
[libx264 @ 024c6e00] 264 - core 129 r2230 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=6 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=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 'product000.mp4':
  Metadata:
    encoder         : Lavf54.59.107
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 640x360 [SAR 1:1 DAR 16:9], q=-1--1, 13824 tbn, 27 tbc
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, fltp, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (png -> libx264)
  Stream #1:0 -> #0:1 (mp3 -> aac)
Press [q] to stop, [?] for help
frame=  190 fps=0.0 q=29.0 size=      43kB time=00:00:05.11 bitrate=  68.8kbits/s dup=188 drop=0    
frame=  379 fps=315 q=29.0 size=     117kB time=00:00:12.11 bitrate=  79.4kbits/s dup=376 drop=0    
frame=  568 fps=271 q=29.0 size=     250kB time=00:00:19.11 bitrate= 107.1kbits/s dup=564 drop=0    
frame=  757 fps=241 q=29.0 size=     387kB time=00:00:26.11 bitrate= 121.4kbits/s dup=752 drop=0    
frame=  946 fps=218 q=29.0 size=     514kB time=00:00:33.11 bitrate= 127.2kbits/s dup=940 drop=0    
frame= 1135 fps=216 q=29.0 size=     649kB time=00:00:40.11 bitrate= 132.5kbits/s dup=1128 drop=0