Note: I have a few days ( 3-4 ) of experience with using FFmpeg, and I do not fully understand the commands I mention here ( most of them are from stack overflow forums - I do not have those links bookmarked ).

I wanted to generate a 30-second video, with 16:9 aspect ratio, from a set of images and an audio with blend + zoom and pan effect.

Started this by just generating slide show of images from the video

**Slideshow of images**

    ffmpeg -framerate 1/4 -start_number 1 -i 164470_%d.jpg -c:v libx264 -r 30 -pix_fmt yuv420p -vf scale=16:9 out.mp4

Then, tried adding an audio to the video, and this is the command I used.

    ffmpeg -framerate 1/4 -start_number 1 -i 164470_%d.jpg -i audio.wav -c:v libx264 -tune stillimage -c:a aac -strict experimental -b:a 192k -pix_fmt yuv420p -shortest outWithAudioNew.mp4

With this command, I was able to create the video with zoom and pan effects. It did not cycle through the images, though.

    ffmpeg \
    -framerate 1/4 -start_number 1 -i 164470_%d.jpg \
    -vf "zoompan=z='if(lte(zoom,1.0),1.5,max(1.001,zoom-0.0015))':d=125" \
    -c:v libx264 -t 30 -s "800x450" outWithZoom.mp4


**To add in a blend effect I used this command:**

    ffmpeg \
    -loop 1 -t 5 -i 164470_2.jpg \
    -loop 1 -t 5 -i 164470_3.jpg \
    -loop 1 -t 5 -i 164470_4.jpg \
    -loop 1 -t 5 -i 164470_5.jpg \
    -filter_complex \
    "[1:v][0:v]blend=all_expr='A*(if(gte(T,1.5),1,T/1.5))+B*(1-(if(gte(T,1.5),1,T/1.5)))'[b1v]; \
    [2:v][1:v]blend=all_expr='A*(if(gte(T,1.5),1,T/1.5))+B*(1-(if(gte(T,1.5),1,T/1.5)))'[b2v]; \
    [3:v][2:v]blend=all_expr='A*(if(gte(T,1.5),1,T/1.5))+B*(1-(if(gte(T,1.5),1,T/1.5)))'[b3v]; \
    [0:v][b1v][1:v][b2v][2:v][b3v][3:v]concat=n=7,format=yuv420p[v]" \
    -map "[v]" -aspect 16:9 outWithFasterBlend.mp4

This particular post is from where I got the command to create a video with blend effect.
http://superuser.com/questions/833232/create-video-with-5-images-with-fadein-out-effect-in-ffmpeg

**Blend with zoom**

    ffmpeg \
    -loop 1 -t 5 -i 164470_2.jpg \
    -loop 1 -t 5 -i 164470_3.jpg \
    -loop 1 -t 5 -i 164470_5.jpg \
    -filter_complex \
    "[0:v]zoompan=z='min(zoom+0.0015,1.5)':d=700:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'[v0]; \
    [1:v]zoompan=z='min(zoom+0.0015,1.5)':d=700:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'[v1]; \
    [2:v]zoompan=z='min(zoom+0.0015,1.5)':d=700:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'[v2]; \
    [1:v][0:v]blend=all_expr='A*(if(gte(T,1.5),1,T/1.5))+B*(1-(if(gte(T,1.5),1,T/1.5)))'[b1v]; \
    [2:v][1:v]blend=all_expr='A*(if(gte(T,1.5),1,T/1.5))+B*(1-(if(gte(T,1.5),1,T/1.5)))'[b2v]; \
    [v0][b1v][v1][b2v][v2]concat=n=5,format=yuv420p[v]" \
    -map "[v]" -aspect 16:9 outWithBlendAndZoom.mp4

This command did not work out, I am not sure why. Here is the output:

    ffmpeg version N-63893-gc69defd Copyright (c) 2000-2014 the FFmpeg developers
      built on Oct 31 2014 05:16:04 with gcc 4.6 (Debian 4.6.3-1)
      configuration: --prefix=/root/ffmpeg-static/32bit --arch=x86_32 --extra-cflags='-m32 -I/root/ffmpeg-static/32bit/include -static' --extra-ldflags='-m32 -L/root/ffmpeg-static/32bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --enable-libvpx
      libavutil      52. 89.100 / 52. 89.100
      libavcodec     55. 66.101 / 55. 66.101
      libavformat    55. 43.100 / 55. 43.100
      libavdevice    55. 13.101 / 55. 13.101
      libavfilter     4.  8.100 /  4.  8.100
      libswscale      2.  6.100 /  2.  6.100
      libswresample   0. 19.100 /  0. 19.100
      libpostproc    52.  3.100 / 52.  3.100
    Input #0, image2, from '164470_2.jpg':
      Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
        Stream #0:0: Video: mjpeg, yuvj422p(pc), 1600x1200, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Input #1, image2, from '164470_3.jpg':
      Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
        Stream #1:0: Video: mjpeg, yuvj422p(pc), 1600x1200, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Input #2, image2, from '164470_5.jpg':
      Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
        Stream #2:0: Video: mjpeg, yuvj422p(pc), 1600x1200, 25 fps, 25 tbr, 25 tbn, 25 tbc
    File 'outWithBlendAndZoom.mp4' already exists. Overwrite ? [y/N] y
    [swscaler @ 0xba66100] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbaa23a0] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbac4680] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbae6960] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbb07260] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbb2af20] deprecated pixel format used, make sure you did set range correctly
    [swscaler @ 0xbb4d200] deprecated pixel format used, make sure you did set range correctly
    [Parsed_concat_5 @ 0xba8e060] Input link in1:v0 parameters (size 1600x1200, SAR 0:1) do not match the corresponding output link in0:v0 parameters (1280x720, SAR 0:1)
    [Parsed_concat_5 @ 0xba8e060] Failed to configure output pad on Parsed_concat_5

So now, I want to be able to do all of this in one command. Summarizing what I need in the video:
1. 30-second video with blend and zoom + pan effect.
2. Audio
3. And each image in the video must get an equal amount of time. If 5 images, then each image must last for about 6 seconds.
4. The aspect ratio of the video should be 16:9.

Not all the images I use have the same resolution, can FFmpeg work with such images? Or I need to work on those images to have the same resolution

With my current understanding, I know what a 'filtergraph', 'filterchain' and a 'filter' is. But I do not fully understand what each filter argument does.