How do I multiplex to FLV?

[Videogamer555]

I have AAC and H264 audio and video that I demuxed from an MP4 file using MP4box, and I want to multiplex these streams into an FLV file. What software do I use? I must emphasize I do NOT want to reencode it. Every time you reencode with a lossy format like MP4, you lose video quality. So directly demuxing and then remuxing into a different container format (like MP4 to FLV file) is the best option.

[Baldrick]

mp4 works fine in flash players.

But if you really want a flv I think you can use a newer version of ffmpeg, command line like:

ffmpeg -i input.h264 -i input.aac -vcodec copy -acodec copy output.flv

[Videogamer555]

Isn't their a dedicated FLV-Multiplexer software? I don't have ffmpeg, nor am I ever interested in getting it. I've tried it before and I hated it completely. I detest anything that uses command line instead of GUI. You know like where you select the input files you want with a file selection dialog box and the output file name and then click that big "Multiplex" button. Doesn't such software exist?

[Baldrick]

Xmedia recode can remux the mp4 to flv. I just tried it and it worked fine.

Open the mp4, under Format choose flv, then under the video tab choose video copy, under the audio tab under modus choose copy. Add job. Encode. No reconversion.

[Videogamer555]

Is there a way to change frame order without reencoding? A sort of "modified" stream copy if you will. I ask because I need to swap the frames 1 2 3 4 5 6 to be arranged 2 1 4 3 6 5. I need this because when I used a program to download some streaming video I believe the frames were in reverse order to start with. The resulting video looks real jumpy, but the special embedded flash player on the website must have been programmed to play the frames in the correct order. This must have been copyprotection.

[Baldrick]

I don't think so.