Hello I have the K-Lite Codec Pack 64 bit installed and now I can also play avi with windows media player. So the codec is installed properly. But with vegas I can't load or play avi how is this possible?
A random forum search re K'Lite was that installing K-LIte is not a great idea for Vegas Pro. Use the forum search function yourself to explore further.
Consider yourself lucky. You might well have needed the system image that you take on a monthly schedule or indeed a clean install of windows. You could always use handbrake(free) to convert .avi to .mp4. Much safer than installing codec packs.
@Frans-zijl Out of curiosity, I just downloaded a Camtasia trial and see it's actually 2 apps... "Camtasia 2022" and "Camtasia Recorder 2022". Only tried the recorder without registering. It's settings support 2 encoders (Preferences, Inputs): TSC2 and H.264. I chose H.264. It recorded a file with the ".trec" extension to Documents\Camtasia. Renamed the recording to end in ".mp4". Which Vegas recognizes and can edit directly. Not particularly great media info, however (wide range VFR, gops, and low bitrate 44.1k audio):
Complete name : C:\Users\hv\Documents\Camtasia\Rec 8-25-2022-4-02-10-PM.trec.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/isom)
File size : 37.9 MiB
Duration : 33 s 347 ms
Overall bit rate mode : Variable
Overall bit rate : 9 544 kb/s
Encoded date : UTC 2022-08-25 20:01:33
Tagged date : UTC 2022-08-25 20:02:10
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L5.1
Format settings : 1 Ref Frames
Format settings, CABAC : No
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=30
Muxing mode : Container profile=Baseline@3.1
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 33 s 347 ms
Bit rate : 9 422 kb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.717 FPS
Minimum frame rate : 7.790 FPS
Maximum frame rate : 167.598 FPS
Original frame rate : 30.000 FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.038
Stream size : 37.5 MiB (99%)
Title : 100
Encoded date : UTC 2022-08-25 20:01:33
Tagged date : UTC 2022-08-25 20:02:10
Color range : Limited
Matrix coefficients : BT.709
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 33 s 320 ms
Bit rate mode : Variable
Bit rate : 110 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 448 KiB (1%)
Title : 102
Encoded date : UTC 2022-08-25 20:01:33
Tagged date : UTC 2022-08-25 20:02:10
I suspect that the full app just transcodes the avi from that file.