First, does your Project Preset match that odd source footage 100%, or is there a typo in the Frame Size of the source material?
Are you Exporting/Sharing the Interlaced footage as Interlaced, or as Progressive?
Many users feel that the Adobe Export/Share to WMV is not the ultimate, and recommended the free Windows Media Encoder, as they felt that it did a better job. However, it was my understanding that MS was going to drop WME. If it is still available (even from an "abandonware" site, I would pick up a copy and try it.
sorry that's a typo, source as well as setting is 1440 x 1080.
The WMV codec settings dialog has only one check box regarding interlacing: "allow interlace processing" which, either one or off, does not improve the result.
I know a workaround is exporting a full-size mpeg-2 and encode wmv in a separate program.
Where and how do you plan to share this video, Oliver?
If you're planning to show it online, you'll need to compromise some quality in order for the video to stream smoothly.
If you're planning to view it on a computer, TV or similar display, there will likely be more efficient formats than a WMV.
I use wmv to boil down my HDV footage in order to email short sequences and found it quite effective. Also, the codec is mostly available on the email recipients' windows computer and does not require any additional codec installation.
Do you have another suggestion which codec to use?
Are you using Constant Bitrate or Variable Bitrate in your export settings? I believe that Constant Bitrate 2-pass will give much better results. Also, if output is to 1440x1080, try no less than 5000 kbps for constant bitrate and use 20 for the quality slider. See: http://muvipix.com/phpBB3/viewtopic.php?f=20&t=2029&p=16568&hilit=stanford#p16568
E-mailing WMVs or MOVs is very inefficient. E-mail boxes have a size limit or get clogged up if your video is of any size, and that can confuse your recipients. And, as I've said, in order to get the file to a reasonable size, you've got to compromise a lot of quality!
Besides, any responsible computer user knows that you NEVER open an attachment unless you know exactly what it is!
You'd be much wiser to post your video to a site like Vimeo.com (which saves your video at a much higher quality than YouTube) and then send your recipients a link to it.
Use John Cloudman's settings in the FAQs to the right of this forum and you should get excellent results.
For e-mailing AV files, I use YouSendIt, and the clients do not end up with either an attachment size issue, or a full InBox. They get an e-mail with the URL for the file on the YouSendIt server, so I do not have to compromise on quality. There are several useful settings, such as Security/Password, limits set on number of downloads, and even receipt for the download. While not free, it is a good system for my needs. There are other services, but that is the one that I use.