- Sep 22, 2010
My guess is "probably not". The only parameter that will have a direct effect (other than adding a few pixels to the width/height) is bitrate, and going from 900 to 1000 will probably have a small effect. If I had to guess, I'd estimate it would increase a 1GB file to maybe 1.2GB, but I suspect it'll depend a lot on the content (color, scene complexity, motion).I'll try making some changes based on this, but.... Won't your suggestions end up making much larger files?
And now for a short sermon by Matt!
I've evolved a bit in my own thinking regarding compression (file size vs. bitrate) settings. For the longest time, I had a device (Archos 605) that I only fed DivX, so I ritualistically encoded each movie to 500MB (then 700MB...then 1GB...) using 2-pass encoding in AutoGK. Next came my Droid, and so I transcoded the DivX movies over to h.264. Given the 3.7" screen on the Droid, everything I transcoded played beautifully.
Along came the 7" screen on the Nook. Of course the first thing I did was copy over all the mp4's from my Droid to the Nook, and they were perfect too. But then the s*** hit the fan: I bought an h.264 capture device for my Dish DVR, and started capturing HD movies (either 4 or 8GB). I wondered how those would look on my gorgeous Nook screen, so I gave those to Handbrake and said, "HA!!! Try and transcode those!" and voila my "How-to" on this forum was born.
Using Handbrake, at first I did my ritualistic "everything at fixed filesize of 1GB" regardless of length or content. That felt stupid. So I started playing with the Constant Quality setting, and noticed something interesting (I have two kids by the way): because of the way backgrounds and textures are rendered in animated movies, using QC ended up with VERY COMPACT output...often 500-600MB and low bitrates. Non-action movies ended up around 700-800MB (depending on length) while several action movies (e.g., Harry Potter) ended up around 1GB and like markiej noted, maybe 900-1000 kbps bitrate. Like I noted in the How-to, there were some exceptions (e.g., Transformers 2 was gigantic...so I ended using a fixed bitrate on that).
OK, this wasn't short at all. Sorry! But I guess my point was that I've come around to using the QC setting (at 19 or 20) more, which is awesome insofar as it's 1 pass and often encodes faster than realtime...and occasionally use the fixed filesize or bitrate option on an as-needed basis. Of course I'm a control freak and want everyone to do what I do...but in all seriousness, please don't take it that way! Honestly, I just wanted to toss in my 2 cents fwiw.