i am placebo.
personally, i dont fix FLV's.
so here is what i do (if you're interested in placebo's experience and wisdom

):
- open the original FLV with Jaksta (RMC 4) Fix FLV module.
- note down on a piece of paper the so-called "videoframerate", as given by Jaksta. it is the most truthful number you can get. dont believe the numbers given by MediaInfo or by FLVExtract (the latter gives 2 numbers).
- Extract the FLV contents (often: *.264, *.aac) with FLVExtract. It's a lossless extraction process.
- Use Yamb to recombine the raw audio and raw video. If you are asked to enter a frame rate (the yamb default is: 25.0000), enter the number which you had written down on the piece of paper. For this you must find the piece of paper first!

- The end result is a perfect(!) losslessly created MP4 file.
This whole procedure is fast because it doesnt involve encoding or reencoding.
DONT FIX FLV FILES EVEN IF IT IS POSSIBLE.
AND DONT CONVERT FLV TO MP4 LOSSLESSLY EVEN IF IT IS POSSIBLE. If you have a 1400MB-sized HD FLV-file (e.g. from
Amazon Instant Video, HD) and try both paths (flvextract&yamb vs. lossless conversion), then you'll know

)
See also:
http://stream-recorder.com/forum/fix...les-t5751.html
http://stream-recorder.com/forum/rep...flv-t4605.html
http://stream-recorder.com/forum/mer...aac-t8800.html