newbie Q about cutting data from flv

[edurbrow]

I managed to download a performance I was in that was streamed to the web. My bits are at the beginning and again about 2 hours into a 3 hour video. I would like to split the file in two and permanently erase the parts I am not in and therefore reduce the file size of this 588MB flv file. I'm wondering what the most efficient program and easiest way to do this is on a Mac OSX platform. Most of the programs I have seem to convert files to a bigger size and not erase things permanently. (I think) Like the title says, I'm a newbie.
Thank you in advance.

[Baldrick]

Try avidemux, open flv, set start and stop, save as new mp4. No video reconversion.

[edurbrow]

That program crashed every time I tried to open it. Any other programs that would do the job?
TIA

[shaema]

Try avidemux version 2.5.0 : set video=copy, audio=copy and the format container to flv. Set start and stop and select File>Save>Save Video. Give it a new file name and add the [.flv] extension.

If this did not work, it may be helpful to provide us with a text report of MediaInfo.

[shaema]

oops!

My comments were relevant to the windows version and not the mac osx version. But the idea is the same.

[edurbrow]

Try avidemux version 2.5.0 : set video=copy, audio=copy and the format container to flv. Set start and stop and select File>Save>Save Video. Give it a new file name and add the [.flv] extension.

If this did not work, it may be helpful to provide us with a text report of MediaInfo.

I'm not sure what the equivalent to MediaInfo on the Mac would be. Would that be the Crash Report? Here it is:

Process: avidemux2 [336]
Path: /Applications/ •Video/avidemux2.app/Contents/Resources/bin/avidemux2
Identifier: avidemux2
Version: ??? (???)
Code Type: X86-64 (Native)
Parent Process: bash [319]

Interval Since Last Report: 1160581 sec
Crashes Since Last Report: 25
Per-App Interval Since Last Report: 0 sec
Per-App Crashes Since Last Report: 4

Date/Time: 2011-06-12 08:57:26.832 +0900
OS Version: Mac OS X 10.5.8 (9L30)
Report Version: 6
Anonymous UUID: D560788C-08BD-4D1F-BC11-667FA18A724C

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Crashed Thread: 0

Dyld Error Message:
Library not loaded: /Users/Shared/development/avidemux_related/avi_25_x86_64/lib/libADM5avutil.dylib
Referenced from: /Applications/ •Video/avidemux2.app/Contents/Resources/bin/avidemux2
Reason: no suitable image found. Did find:
/Applications/ •Video/avidemux2.app/Contents/Resources/lib/libADM5avutil.dylib: unknown required load command 0x80000022

I did try downloading avidemux2 again, but it still crashed instantly when opened. What would be really nice is something like a video equivalent to Audacity.