Hello,

The following command creates a sub-video from the original video, taken by Sony Cam (AVCHD-format):
ffmpeg.exe -i "D:\Testdaten\2011-05_0044.m2ts" -y -ss 0.01 -vcodec copy -acodec copy -t 119,01 "D:\Temp\001_2013_01_27_06.m2ts_0004,99_0034,9.m2ts"

The result delivers 2 problemes:
1. (urgent): The outfiles can't be played with Windows Mediaplayer (WMP) properly. The video starts, but you can't press any control, can't stop, close, resize or change anything - you have to kill the Task.
Even if you wait, until the video-end is reached an you replay the video, then you can´manage the video in a normal way.
I thought, when I use "-vcodec copy -acodec copy", everything wouldbe copied, but I think, something ist wrom with the outfiles.
You can look at an example right here: http://www.scenator.de/downloads/2013_01_27_06.m2ts (original - 44 sec., 90 MB!): WPM is playing this file in a normal way
http://www.scenator.de/downloads/VideoSnapshot_001_2013_01_27_06.m2ts_00... (converted - 59 MB): WMP can't be clicked.
Sure - mpc has no Problems wit the converted file, but not sadly is not installed on each systeme ;o(, so often, I have to use the default Player.

2. (not so urgent but not nice): Obviously ffmpeg.exe can't create a outfile with a 4-digit extension, so I have to change ".m2ts" to ".mpg", afterwards I have to change the extension to original- m2ts on my own.

Best regards,
Frank

Details of 2011-05_0044.m2ts:
FFmpeg version SVN-r25456-Sherpya, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 14 2010 16:46:15 with gcc 4.2.5 20090330 (prerelease) [Sherpya]
libavutil 50.32. 3 / 50.32. 3
libavcore 0. 9. 1 / 0. 9. 1
libavcodec 52.92. 0 / 52.92. 0
libavformat 52.81. 0 / 52.81. 0
libavdevice 52. 2. 2 / 52. 2. 2
libavfilter 1.51. 1 / 1.51. 1
libswscale 0.12. 0 / 0.12. 0
libpostproc 51. 2. 0 / 51. 2. 0

Seems stream 0 codec frame rate differs from container frame rate: 50.00 (50/1) -> 50.00 (50/1)
Input #0, mpegts, from 'D:\Testdaten\2013_01_27_06.m2ts':
Duration: 00:00:44.04, start: 0.941611, bitrate: 16860 kb/s
Program 1
Stream #0.0[0x1011]: Video: h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s
Unable to find a suitable output format for 'showinfo'

Details of 001_2013_01_27_06.m2ts_0004,99_0034,9.m2ts:
FFmpeg version SVN-r25456-Sherpya, Copyright (c) 2000-2010 the FFmpeg developers
built on Oct 14 2010 16:46:15 with gcc 4.2.5 20090330 (prerelease) [Sherpya]
libavutil 50.32. 3 / 50.32. 3
libavcore 0. 9. 1 / 0. 9. 1
libavcodec 52.92. 0 / 52.92. 0
libavformat 52.81. 0 / 52.81. 0
libavdevice 52. 2. 2 / 52. 2. 2
libavfilter 1.51. 1 / 1.51. 1
libswscale 0.12. 0 / 0.12. 0
libpostproc 51. 2. 0 / 51. 2. 0

Seems stream 1 codec frame rate differs from container frame rate: 50.00 (50/1) -> 50.00 (50/1)
Input #0, mpeg, from 'D:\Testdaten\001_2013_01_27_06.m2ts_0004,99_0034,9.m2ts':
Duration: 00:00:29.98, start: 0.500000, bitrate: 16015 kb/s
Stream #0.0[0x80]: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s
Stream #0.1[0x1e0]: Video: h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
Unable to find a suitable output format for 'showinfo'