vasudev71
6th August 2002, 19:59
Hi,
Recently, I managed to peep into a quicktime .MOV file
information and found something interesting.
Although this information is got from a third party NLE software, the software used does not matter here.
My source is a NTSC DV AVI (720x480) captured thru firewire with no single dropped frame. I converted this to a QuickTime .MOV file with no recompression involved.
There is a line that reads in the converted .MOV file info:
Quality 3.00(Normal)
Temporal 3.00 (Normal).
What does this mean in the quicktime format?
Interestingly, I managed to covert the source NTSC DV AVI to a .MOV file with compression set to None and then opened it in the third party software.
Surprise...Surprise..this is the quality setting reported:
Quality 5.00 (Best).
When I played this file thru QuickTime player, the second file with Quality 5.00 (Best) has excellent quality than the previous one.
I asked the CatDV tech support (which I used for conversion) for answers and they didn't give me a satisfactory reply. They just told me that Quality 3.00 (Normal) is the same in the source file (NTSC DV AVI) and that CatDV does not do any recompression.
My question here is if CatDV didn't do any recompression, why would the Quality number vary between 3.00 and 5.00 between these two .MOV files?
Also, what exactly does it mean by Temporal in QuickTime?
I would appreciate a positive feedback from any QuickTime expert out here.
Thanks.
VS
Recently, I managed to peep into a quicktime .MOV file
information and found something interesting.
Although this information is got from a third party NLE software, the software used does not matter here.
My source is a NTSC DV AVI (720x480) captured thru firewire with no single dropped frame. I converted this to a QuickTime .MOV file with no recompression involved.
There is a line that reads in the converted .MOV file info:
Quality 3.00(Normal)
Temporal 3.00 (Normal).
What does this mean in the quicktime format?
Interestingly, I managed to covert the source NTSC DV AVI to a .MOV file with compression set to None and then opened it in the third party software.
Surprise...Surprise..this is the quality setting reported:
Quality 5.00 (Best).
When I played this file thru QuickTime player, the second file with Quality 5.00 (Best) has excellent quality than the previous one.
I asked the CatDV tech support (which I used for conversion) for answers and they didn't give me a satisfactory reply. They just told me that Quality 3.00 (Normal) is the same in the source file (NTSC DV AVI) and that CatDV does not do any recompression.
My question here is if CatDV didn't do any recompression, why would the Quality number vary between 3.00 and 5.00 between these two .MOV files?
Also, what exactly does it mean by Temporal in QuickTime?
I would appreciate a positive feedback from any QuickTime expert out here.
Thanks.
VS