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How can I stop loosing quality??
Hi Everybody,
I’ve got a little problem…
I have got an “old” movie on dvd which I would like to edit.
I have converted this VOB file with “any video converter 2.6.5” to an AVI wich after effects and premiere both accept. The avi is 640×480 25frames/sec and the quality is still acceptable when I view this avi in windows media player.
In after effect i have add an layer with black bars on top and the bottom of the movie so it gets an 16:9 look. These bars give me the opportunity to remove some camera shakes in the y-direction, without having to scale the movie up or something.
I also have done some colour correction with auto colour.O.k. now my problem.. When I export the movie to a new avi it looses some detail quality. the new movie is also 640×480 and 25 frames/sec but some area’s in the movie are getting an ugly blocking look like is t a very low quality jpeg or something..
I have also rendered the movie to an avi.. But this gives the same detail reduction..Is there somebody who is familiar with this problem?? And knows something how to keep the detail in the movie??
Cheers,
Tim
(from the Netherlands) -
4 Replies
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Well, starting from a DVD source is never ideal, but it sounds like that is your only option.
Two things:
If possible, when ripping the DVD, make sure to rip the full resolution. I’m in the States, but I believe PAL DVDs have a resolution of 720×576. After Effects will read the proper pixel aspect, etc.Secondly, what compression is applied to the AVI (both when converting from DVD and rendering out of AE)? AVI is just a container format. The actual compression can be one of several codecs. If I had to guess, it sounds like you’re rendering out of AE as DV or some form of MPEG.
Any extra information you have would definitely help narrow down the problem.
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Hi Paul thanks for your reply!
when i open my vob in VLC media player i found that the file uses an MPEGV codec for video. i can’t see what the resolution is.
when I open the vob in any video converter it says that it has a resolution of 352×576 25fps i’m not sure of this is correct because the video looks acceptable..
I had convert it to an AVI with an wmv1 codec for video and aac for audio.
the resolution of 640×480 is something that i have choosen from a list. (I thought this was handy because I would like to upload the file when finished on vimeo.com).
when I played my avi file the movie lookes still fine to me.now i have import it in after effects I dit some edits (without scaling the movie) and rendered it with:
render settings: Best settings, size 640×480
output module: lossless
format: video for windows
output info: no compression.Do you see what I do wrong, what caused the loose of quality??
Tim
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If your starting vob is 352×576, I would have guessed that’s where your problem is. But if it looks fine until it comes out of AE, that’s odd. What other codec options do you have when you convert it to an AVI?
Your render settings look fine. What is your comp set to? There might be a little weird artifacting when you’re removing the camera shake, but that’s all I can think of.
The last thing I might recommend is to check the lossless output module. If you have quicktime, try changing it from avi to quicktime and using “Animation” as the compressor.
CS3, FCS2
[Note: Using Particular, 3-D Stroke, and now Form do not instantly make your designs “teh awesome.”] -
Hi Paul, thanks for your reply,
The other options I have for avi codecs are: xvid,mpeg4,msmpeg4,msmpeg4v2,wmv1,wmv2,mpeg2,mpeg1,h263p,x264,huffyuv,
ffv1 and original..i had my video bit rate set at 768, I don’t know if this is parameter has a big influence.
i have just rendered the movie as a quicktime movie with the animation setting (spatial quality=most (100))I still see some quality loose. Maybe I have to accept the result.
For my future projects I use some better quality footage, now I have got a canon fs-100 camera which records PAL mod files which I can convert to mpegs. In the future I hope to buy a HD camera.
Which render settings do you advise to keep the quality loos to a minimum if I edit in AE and compose in premiere cs-3??
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