Avid import wmv file, just audio no video I've got a few wmv files, when I import them into avid it seems that the video channel is not being imported. There's just audio. 

Am I missing something in the import stage? Or in the handling of the sequence?
This is likely due to the video codec that you are using. First, an explanation of terms is required: WMV is a container format. These can contain one or more video or audio streams - with video this is normally one video &amp; one audio stream; and these are encoded with various codecs (coder/decoder). I'm not very familiar with the WMV format - for editing I use proper intermediate codecs (Apple ProRes in my case; more in this in a moment), and I prefer MP4 as a delivery codec.

There are broadly three 'types' of video codec: capture codecs, that a video camera will use to record the video; intermediate codecs, that are more suited to post-production editing (they trade larger files for requiring less processing power &amp; the ability to easily cut on any frame); and delivery codecs, that are more compressed (so they can be streamed over the internet, or so you can fit a decent length on a physical medium like a DVD, or for broadcast). There is some overlap between these (many DSLRs use h.264, which is designed to be a delivery codec, to capture video).

This stuff also applies to audio - though there you should use uncompressed PCM audio. However, since audio decompression requires far less processing power, some NLEs will allow you to get away with compressed audio.

I have never heard of the WMV format containing any intermediate formats, as far as I know it's a purely delivery format. That's probably the cause of your problem. I've never used Avid, so I don't know  exactly which intermediate codec you should use. Since it's designed by Avid, the DNxHD codec is a good bet for video (you should convert your audio to PCM audio while you're at it).

Your video editing software probably came with a media conversion tool. You could also use the command-line-based ffmpeg (wiki) to encode to DNxHD. For the following command, you would need to adjust the bit rate - here it is 36 megabits/second - see here for some information on what you should use. Note that the ffmpeg syntax used in that guide is somehat out of date; you should use -c:v instead of -vcodec and -b:v instead of -b. This following command will also convert the audio to uncompressed 16-bit PCM, for maximum compatibility:

ffmpeg -i input.wmv -c:v dnxhd -b:v 36M -c:a pcm_s16le output.mov