How to Convert MTS Video to FLV on Snow Leopard?
Tutorial: 
Possible confusion: Got an interesting mts video from wonderful HD Camcorder and was going to upload it to Youtube for sharing, but failed?
Our analysis: The AVCHD formats(MTS, M2TS, TS, TRP) produced by AVCHD Camcorder can not be accepted by Youtube which like FLV best.
Solution for you: We provide you with MTS to FLV converter for Mac as a perfect solution.
Get full version 
Download mts converter for mac trial version
As long as you have our easy-to-use MTS to FLV converter for Mac, you are able to:
1. convert AVCHD.mts to flv, mts to f4v, upload mts to flv.Youtube for sharing and also can convert mts files to other Youtube formats like avi, mp4, mov etc for uploading on Mac.
2. convert MP4, MOV, MPG/MPEG(MPEG-1/2), VOB(DVD), AVI(DivX,Xvid), etc. to FLV/F4V(YouTube) on Mac freely.
3. extract desired audio clips from your files and save as MP2, MP3, WAV, WMA, FLAC etc. on Mac with MTS to FLV converter for Mac.
4. edit the MTS files as you like through Merge, Trim, Crop(16:9, 4:3 is available to your choice), Effect(adjust Brightness, Contrast, Saturation) and Settings(able to Set the Resolution, Frame Rate for video and Sample Rate, Channal for audio here).
Tips
AVCHD: AVCHD (Advanced Video Coding High Definition) is a format for the recording and playback of high definition video.
HD video: HD video(High-definition video) refer to video with resolutions of 1280×720 and 1920×1080). The most common HD video is AVCHD, MTS, M2TS, TS, TP, etc.
Common HD camcorders: Canon VIXIA HF200, Canon FS200, Canon VIXIA HFS100, Canon VIXIA HG21, Panasonic HDC-HS300, Panasonic HDC-HS20, Sony HDR-CX100, Sony DCR-SR47, JVC GZ-HD40, JVC GZ-HD10 etc.
M2TS/MTS to FLV Guide:
Step1: Download and add MTS files to Mac OS MTS to FLV converter
Download MTS to FLV converter, install and run it on your Mac, then click Add on the top of the interface to add MTS files, you can add more than one a time. 
Step2: Set output format and save to certain locations
Click drop down list one the right of the Profile, choose FLV extension, and then click Browse to set the destination, such as desktop.
Step3: convert MTS video to FLV with MTS to FLV converter for Mac OS X
Just click Convert on the bottom of the interface, MTS video will be converted to FLV files with best quality and fast speed automatically.
Additional:
Edit MTS video to FLV(YouTube) with Mac MTS to FLV converter
Click Trim on the top of the interface, you can see a interface and set the starting and ending time of MTS video as you like. 
Click Setting next to drop down list, you can set the Resolution etc. of your MTS video easily.
Click Edit next Trim, a interface will pop up as below and you can adjust your MTS video through Crop and Effect freely.
now we have successfully finished the whole MTS to FLV on Mac conversion process. Please don't hesitate to contact us if there is any problem, we are ready for help.
Note: this guides is only for Mac OS user. If you using Windows, Please Click here to learn convert mts to flv for windows.
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