ffmpegX conversion in x264 not working

[trovon]

When I try to convert and AVI file to iPod, by using x264
it takes some seconds and does nothing for the video and
begins to encode audio.

When a uncheck the "decode with quicktime" the things
work.

Any reason for this? Is there any problem with my quicktime?

Thanks in advance.

Alexandre Trovon

[Case]

AVI can hold video and audio encoded with any from a large variety of codecs. Only some of them can be decoded with a default QuickTime. For some codecs you may need to install additional 'components' (plug-ins) to make QuickTime able to decode the content of the AVI.

Many DivX/XviD AVIs use part of the MPEG-4 specification (MPEG-4 Advanced Simple Profile) that is not supported by a default QuickTime (just MPEG-4 Simple Profile), e.g. encodings using B-frames.

The most popular solution these days is provided by Perian, a multi-codec decoder component that will help QuickTime decode (read) many formats. I'm pretty confident that Perian will solve your issue.