I previously posted my problems on the DirectorZone forum and Captain Kevin offered some advice and suggested I post my problems here along with some example footage.
I have a Panasonic TM700 and am shooting HD footage which the camcorder compresses in AVCHD. The camera settings for the footage are Full HD 1920 * 1080 50i and the bitrate is 17Mb/s.
When I play back the footage on the PC it is excellent quality.
When I do basic editing in PD8 the quality remains at a high level (high enough for me anyway), but if I do any editing that involves resizing or repositioning of the video clip, the output is poor. I understand that Panasonic's version of AVCHD is not compatible with PD8's SVRT technology, so any editing is subject to a re-encode with subsequent quality loss, and this I can accept (and the results are high enough quality for me). When I do a basic edit, the re-encoding of the video retains the framerate (or more importantly the interlaced fields) and the quality is acceptable, but if there is any video repositioning or resizing, PD seems to de-interlace the video by blending the fields into a single frame, which it cannot separate back after the resizing is done, so the result is effectively a reduction inthe framerate and a lack of smooth motion - I am now suspecting it is a combination of the Panasonic AVCHD format and PowerDirector 8 but hopefully someone can try to replicate the problem to help prove or disprove my hardware or setup.
My original post on the DirectorZone forum is here:
http://directorzone.cyberlink.com/posts/list/2142.page;jsessionid=77C2F9AC6012A761E47EE16D0F27EF6F.web2
The clips I have included hopefully demonstrate the problem. There are three clips:
The first is the original source taken straight from the camcorder. This is the best quality (as expected).
The second has been imported into PD8 and has had some basic editing done, including a couple of fades and the audio changed. This was output as AVCHD at 24Mbps - as SVRT isn't supported for the Panasonic footage, this was re-encoded so I chose 24Mbps to keep the quality as high as possible (there is bound to be some degradation with it being encoded but the higher bitrate should help minimise quality loss). The quality is acceptable and the motion is smooth.
The third clip shows the problem - the only editing done is to use the PowerTools crop feature to zoom in slightly. This alone should reduce quality slightly as the resolution is being reduced, and SVRT still can't be used (and wouldn't on any footage due to the modified resolution) so a quality drop on each frame is expected, but it is the motion degradation that I want to avoid - the movement is no longer smooth and the video blurry.
I hope someone can try to replicate this form me and confirm if it is a limitation of the combination of camera and software or if it is something in my setup.
Many thanks in advance...
Tim
Filename | 2. Output with basic editing using PD8 - no SVRT.m2ts |
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Description | After Basic Edit - quality ok |
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Filesize |
43680 Kbytes
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Downloaded: | 250 time(s) |
Filename | 3. After Resize.m2ts |
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Description | After Resize - quality poor - motion not smooth |
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Filesize |
42416 Kbytes
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Downloaded: | 247 time(s) |
Filename | 1. Original Source Video.m2ts |
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Description | Original Source |
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Filesize |
30552 Kbytes
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Downloaded: | 214 time(s) |