It was an error of my part. All is OK. Sorry for this and you can delete my post.
Thanks for your speed response.
I have several videos in H264 and Dolby Digital sound that have suddenly become unreadable. They jerk a lot.
The same videos could be read just a few weeks ago.
An update Infuse or apple?
Are other people experiencing this problem? I have not seen anything like this on the forum.
Thank you in advance for your feedback.