Bernhard Frühmesser wrote: > Hello, > > I was wondering if anyone knows the programm Compressor from Apple?! > > I am asking because i was curious and did a test with a 6 minutes video, > one i encoded to MPEG2 using "Compressor" under MAC OSX and then i used > mpeg2enc on the same video on my Linuxbox. > > I am sure i used the same settings on both computers but the file > created on the Mac with Compressor has about 415MB while the file > created with mpeg2enc has only 114MB so far i don´t see much quality > difference. > > So i was wondering what this could come from? Any ideas?!
Unless the two MPEG2 encoders are 100% identical, you will get different results, no matter how similar you think the settings are. No surprise. If the image quality really is the same (and it's good in both cases), then probably the encoder that generates the larger file is just wasting bits (it's configured at a too high bitrate, or whatever). But did you do an A/B comparison of the two files? Do they really look the same? I've seen pretty big differences in size between two MPEG2 files, one of them "perfect" (well, lossy perfect), the other with just a small amount of mosquito noise. Once you're close to "perfection" you have to really crank up the bitrate to produce any kind of visible changes. -- Florin Andrei http://florin.myip.org/ ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
