How to transcode video formats

We're converting a bunch of 开发者_C百科.RM files to .MP4 and wondered what the best way is. Here are the details:

• Convert the files to H.264.
• Keep the filename but add .mp4 to the end.
• Also extract a JPG image of the video at about 5 seconds in for each file and name it the original filename + .jpg.

This is on a Windows system. Is there a free tool you recommend for this? Thank you.

ffmpeg is pretty much the defacto standard app for transcoding video.

http://www.ffmpeg.org/

Convert to h264/mp4:

ffmpeg.exe -i inputFile.rm -vcodec libx264 -s 320x240 -acodec libfaac outputFile.mp4