Originally Posted by RichardT
Originally Posted by jjeff
Editing on the HDD does not incur a reencode, only dubbing in realtime will do that. The tricky thing about using FR and editing on the HDD is it's hard to know what to set FR in the first place. You want to have it in a speed that when edited will HS copy to a DVD.
As Luke said another advantage of a HS dub is it's the only way to retain any chapter marks you may have made on the HDD. The one disadvantage of using HS over a realtime dub(when you've made edits on the HDD) is a realtime dub will kind of smooth out any glitches or slight pauses whereas a HS dub passes them through and you may notice slight pauses where you've made your edit.
I think I now know what you mean about "encoded a lot more vigorously than needed". This is true if you want to have just one title in the maximum bitrate for the DVD. Generally I put multiple titles/DVD and in that case things are a little bit easier. In your example of 2 titles you could record at a FR bitrate that in it's entirety added to another title would be too large for a DVD but after you edited both titles the combination could add up to a full DVD.
Somehow, I'm pretty dense. FR Recording: We have a source of a given length, we have an "encoded " length, and we have a length that will end up on
What determines these values. If I have a one-hour program that will edit down to 40 minutes, how do I tell that to FR? If I specify 40 minutes in the FR menu, won't it stop recording when the clock reaches 40 minutes? I can get three of these onto a regular dvd using "normal" SP edit procedure; what does FR buy me? Could I use FR to get 4 or 5 40-minute episodes HS to a dvd?
If I have 4 hours of tape, what determines its encoding so that it will HS to a 4.7 gb dvd? (Assuming it will.)
Okay, there is a bit here to pile through. First, a standard DVD has, as jjeff has said, 4409MB of "space". The Panasonic DVD recorders have a few default, basic quality, or compression, settings. (I call them that.) These numbers are approximate, and based on HS dubbing, but anyway, XP will put about 1:03 on a blank DVD, SP 2:07, LP 4:15, and then there are EP6 and EP8 that I never use. This is the amount of TIME that the machine compresses into that 4409MB on a blank DVD. If you have a movie that is 1:30, or 2:30 long, using SP for the first results in :30 of wasted space on the disk. If you use LP on the second, you have 1:45 minutes of wasted space
on a disk at that compression level).
FR allows you to use compression levels that are between the standard amounts of XP. SP, etc. so you don't have SO much wasted space, but it fits the recording into a 4000MB title, not 4409MB, so you still are wasting about 10% of the space on a disk.
I *THINK* that is a throw-back to some previous standard that they nevr updated.
IF you set the FR mode for 1:30 and record that 1:30 movie, it will make a title of 4000MB that can be HS dubbed to a disk. If you make a FR title of the second movie of 2:30, it will make a title of 4000MB that can be HS dubbed to a disk. Arguably, this is a more efficient use of the space you have on a disk, even with the 10% under utilization.
Now for the tricky parts: If you have a movie with commercials and you wnt to fit it onto a disk using FR, you have to estimate the time without commercials (Yes, guess) and record it in two parts (hopefully taking advantage of a commercial break). So, if it's two hours of broadcast, and you guess it's really only going to be 1:30 after the commercials are gone, you set the FR for 1:30, for the first half, stop it after an hour or so at a commercial break, then record the second hour, also using the 1:30 FR setting. Edit the commercials out of two titles, combine them using playlists, and hopefully HS dub that to a disk. I have found that my recorders can be finacky about HS dubbing a playlist made using FR this way, so you MIGHT need to record the two titles separately and "endure" a one second pause between the two titles when the disk is played back. As I said, tricky bits.
If you want to use that whole 4409MB (rathern than just the 4000MB that FR is hardwired to), then you have--HAVE--to break up your recording inot two parts. and do a little calculating to determine the actual FR time to set in order to make the recording 10% larger than if you had used the actual time. I have tried to come up with an actual formula, but never finished the calculations into a closed form equation. I strongly recommend you be a bit conservative in your estimates because if the end title is just a little over, you will either have to cut something, OR start all over with a greater time.
If you ever use DL disks, and want to use FR, then you have even more calculations to make, and again, you are constrained into breaking a movie up into two separate titles. I don't have the actual number in front of me, but a DL disk has about 8000MB. This is a convenient number as it's twice the default of 4000GB which allows you to just divide the total time in half for the FR setting.
If you want to have several "titles" on one disk, you need to figure out the total time and enter that in for each FR recording. If you have four shows that are 0:45 each and you want to put them on one disk, you need to enter 3:00 for each one (the total of four 0:45 titles) and then HS dub them to a blank disk. This will fit them into a total of 4000MB remember. If you want to use the whole 4409MB, then you need to use a number like 2:40 rather than 3:00 (about 10% less) for each title.
All of the above is for recording to the HDD and then HS dubbing to a blank DVD. If you record directly onto a DVD, it is even more complicated
. For various reasons, I almost never do direct recordings to the optical media, so someone else needs to explain the issues of successive recordings onto a disk with decreasing free space with each recording.