I have a Samsung C6500 Blu-Ray player and I thought my MP4 problems lay with it but on a lark I tried playing one of my problem files off a USB key and it worked -- so I know for a fact the MP4/H264 combination should work

When I try to stream it over my network from Mezzmo, however, I get 'Not Supported File Format'. Any idea why I'd be getting that?

The profile I'm using is Samsung BDP 3D (that's what it came up with on its own) and the FFmpeg details of the MP4 I'm using as a test are as follows:

ffmpeg version N-36036-ga40f43d, Copyright (c) 2000-2011 the FFmpeg developers
built on Dec 22 2011 13:44:49 with gcc 4.6.2
configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --enable-static --disable-shared --enable-zlib --disable-postproc --prefix=/media/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/dennis/cc/include --extra-ldflags=-L/home/dennis/cc/lib --pkg-config=pkg-config --disable-w32threads
libavutil 51. 32. 0 / 51. 32. 0
libavcodec 53. 46. 1 / 53. 46. 1
libavformat 53. 27. 0 / 53. 27. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 53. 0 / 2. 53. 0
libswscale 2. 1. 0 / 2. 1. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\TV\30 Rock\Season 6\30.Rock.S06E10.HDTV.x264-LOL.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
creation_time : 2012-03-01 21:22:57
Duration: 00:21:19.48, start: 0.000000, bitrate: 970 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x404, 852 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
Metadata:
creation_time : 2012-03-01 21:11:56
handler_name : GPAC ISO Video Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 113 kb/s
Metadata:
creation_time : 2012-03-01 21:23:00
handler_name : GPAC ISO Audio Handler
At least one output file must be specified


---> DB Level Info: 31, 100
---> Frame rate: 23.98
---> Aspect ratio:


Any help greatly appreciated! I suppose in the meantime I can watch it off USB, but that kind of undoes the point of having Mezzmo, doesn't it? (Which I'm loving, BTW).