[FFmpeg-user] [AVCHD] Join + resize?

[Gilles]

Hello

I'm a video newbie and need to perform on Windows the following tasks
on two AVCHD files taken with a Sony camcorder:

1. Join two files (40mn + 10mn; video = MPEG-4 AVC 1440x1080, 50fps;
audio = A52 AC3 48KHz 3F2R/LFE)
2. Shrink the output for viewing on the web

I checked the FFmpeg site and googled before asking, but the examples
are often for Linux and not necessarily for AVCHD.

I tried the following, but ffmpeg.exe isn't happy:

===========================
C:\>ffmpeg -i myfile.mts -vcodec mpeg4 myfile.mp4

ffmpeg version N-46146-g11d695d Copyright (c) 2000-2012 the FFmpeg
developers
[...]
[libvo_aacenc @ 03420260] Unable to set encoding parameters
Output #0, mp4, to 'myfile.mp4':
    Stream #0:0: Video: mpeg4, yuv420p, 1440x1080 [SAR 4:3 DAR 16:9],
q=2-31, 20
0 kb/s, 90k tbn, 25 tbc
    Stream #0:1: Audio: aac, 48000 Hz, 5.1(side), s16, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> mpeg4)
  Stream #0:1 -> #0:1 (ac3 -> libvo_aacenc)
Error while opening encoder for output stream #0:1 - maybe incorrect
parameters
such as bit_rate, rate, width or height
===========================

If someone's used to working with Sony AVCHD files (on Windows), I'd
appreciate any help.

Thank you.