I have a 90 minute video that I am intending to put on DVD. I am rendering it with VF to MPEG2. On a 1.4GHz machine with 1 GB RAM it is taking 4.5 hours to render - about 3:1 ratio. I'd like to reduce this.
The Video was captured to MPG2 by a Dazzle DVC-100. This was imported into VF, edited and then rendered to MPG2. It occurs to me that because the input and ooutput codecs are different, there is a lot of unnecessary decoding/encoding going on during final transformation. (This is purely a speculation since, as my username indicates, I am very much a neophyte in this world.)
Since I am likely to do multiple "final" renders, it occurs to me that the following method might be quicker overall, so I present if for comments. Comments like "You are nuts, it doesn't work that way" are welcomed.
I could import the originally captured MPG file into VF and then render it totally unchanged to a new file, encoded by VF and the SonicFoundry codec.
Then I could edit that file in VF and the final render should be quicker since this original and destination encodings are identical. (This makes the assumption that VF is smart enough to copy portions of the input video that have not been altered to the output without decoding and encoding. Is this correct, or am I full of horse exhaust? If the latter, how can I decrease render times without significant degradation of output quality.
As an aside, I appear to be capable of storing only about 90 minutes of video on a DVD - yet store bought ones contain much longer videos. What accounts for the difference?
Thanks in advance,
Martin H
The Video was captured to MPG2 by a Dazzle DVC-100. This was imported into VF, edited and then rendered to MPG2. It occurs to me that because the input and ooutput codecs are different, there is a lot of unnecessary decoding/encoding going on during final transformation. (This is purely a speculation since, as my username indicates, I am very much a neophyte in this world.)
Since I am likely to do multiple "final" renders, it occurs to me that the following method might be quicker overall, so I present if for comments. Comments like "You are nuts, it doesn't work that way" are welcomed.
I could import the originally captured MPG file into VF and then render it totally unchanged to a new file, encoded by VF and the SonicFoundry codec.
Then I could edit that file in VF and the final render should be quicker since this original and destination encodings are identical. (This makes the assumption that VF is smart enough to copy portions of the input video that have not been altered to the output without decoding and encoding. Is this correct, or am I full of horse exhaust? If the latter, how can I decrease render times without significant degradation of output quality.
As an aside, I appear to be capable of storing only about 90 minutes of video on a DVD - yet store bought ones contain much longer videos. What accounts for the difference?
Thanks in advance,
Martin H