2.7.1.0 stop and start on SOME files

can't really call it stuttering... it completely stops for a second or 2, plays a second or 2, then stops again.. almost as if it is transcoding but not fast enough to keep the buffer full, so to speak..

a file that stops:

ffmpeg version N-40693-gc457a29 Copyright (c) 2000-2012 the FFmpeg developers
built on May 15 2012 12:57:14 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=/home/peter/ffmpeg/build/gpl --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc/include --extra-ldflags=-L/home/peter/cc/lib --pkg-config=pkg-config --disable-w32threads
libavutil 51. 51.100 / 51. 51.100
libavcodec 54. 21.101 / 54. 21.101
libavformat 54. 5.100 / 54. 5.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 73.100 / 2. 73.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 11.100 / 0. 11.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'I:\TV\A-new stuff\survivor.s25e06.hdtv.x264-2hd.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
creation_time : 2012-10-25 01:01:52
Duration: 00:42:18.43, start: 0.000000, bitrate: 1392 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x404, 1257 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
Metadata:
creation_time : 2012-10-25 00:26:31
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 130 kb/s
Metadata:
creation_time : 2012-10-25 01:01:53
At least one output file must be specified


---> DB Level Info: 31, 100
---> Frame rate: 29.97
---> Aspect ratio:

and one that plays fine

ffmpeg version N-40693-gc457a29 Copyright (c) 2000-2012 the FFmpeg developers
built on May 15 2012 12:57:14 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=/home/peter/ffmpeg/build/gpl --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --extra-cflags=-I/home/peter/cc/include --extra-ldflags=-L/home/peter/cc/lib --pkg-config=pkg-config --disable-w32threads
libavutil 51. 51.100 / 51. 51.100
libavcodec 54. 21.101 / 54. 21.101
libavformat 54. 5.100 / 54. 5.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 73.100 / 2. 73.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 11.100 / 0. 11.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'I:\TV\dexter\season 7\Dexter.S07E04.HDTV.x264-ASAP.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isom
creation_time : 2011-09-08 11:43:25
Duration: 00:53:53.10, start: 0.000000, bitrate: 883 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 720x402 [SAR 1:1 DAR 120:67], 745 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
Metadata:
creation_time : 2011-09-08 11:43:25
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 131 kb/s
Metadata:
creation_time : 2011-09-08 11:43:25
At least one output file must be specified


---> DB Level Info: 31, 100
---> Frame rate: 23.98
---> Aspect ratio: 120:67

both being streamed through wireless to an xbox 360

In Mezzmo, check the Transcoding pane when you are streaming these files. If you see them listed as transcoding and they are marked in red, then that tells you your PC is unable to transcode them fast enough for realtime streaming. The workaround for this is to pre-transcode the file before streaming it to your Xbox 360. Right-click on the file and click 'Pre-transcode Files'. Once pre-transcoding has completed, then try streaming the file again. This time, you should see no stuttering/stopping due to transcoding issues. If you still see stuttering/stopping, check your wireless connection as this is a common cause for stuttering playback. If possible, your wireless connection should be wireless-N with full signal strength for best results.