We were making animation AVI file with sound.
It was working.
Suddenly a problem happened.
This problem happened after we changed the frame rate when we have an imported sound.
Only a few picture frames were produced followed by white blank frames. It was working fine when we were inside of the Pose5.

We tried our previous file without sound. It worked fine.
Once we added a sound to it, again, only a few picture frames, and white blank frames were produced.

Thank you for your help in advance.
HimiCo.