Anything to FLV

[betolley]

I have a old imac with 10.3.9. I run the conversion for mov to flv or avi to flv. The output is always a jumpy video. I have encoded at 500 bit rate with 18 fps. I encode the same video on windows with format factory and it is fine. I use ffmpegx and the audio and video is jumpy. I converted mov to avi and that is fine. The problem is only with flv. An example is here:

http://www.fisherychurch.org/cms/node/198

The one I did with format factory is here:

http://www.fisherychurch.org/cms/node/197

Any help would be appreciated.

BT

[Case]

The first video is encoded at 12 fps, not 18, making the motion less smooth. The file loses audio at about 0:11:50 in, just silence after that point. The file also lacks meta-data, so the time-remaining and jump-to-different-point-in-the-clip do not work. flvtool2 could have injected the necessary meta-data.

About the jumpiness, beyond the low framerate:
Possibly you've ran into the bug of ffmpegX's invert mapping in combination with encoding to FLV in combination with Flash Player playback.
http://forum.videohelp.com/topic341561.html#1810515

[betolley]

I gave up on it and made shell script called encode.sh

./mencoder $1 -ofps 25 -o $2 -of lavf -oac lavc -lavcopts  acodec=mp3:abitrate=32 -srate 22050   -ovc lavc  -lavcopts vcodec=flv:keyint=50:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -vop scale=640:480

Output was fine.

[Case]

flv encoding with mencoder instead of ffmpeg, cool. Hadn't seen the command before.