On Wed, 5 Feb 2003, Edouard Chalaron wrote: > Hi Vladimir > > Thanks for the mail. > My question was in fact : can I encode the same DV file into PAL or NTSC > knowing that the camera that has been used to record the DV files is a NZ > one, NZ being in PAL standard, eg is the DV format independant from any NTSC > or PAL or SECAM ?
As others have pointed out, DV does have multiple standards, usually referred to as NTSC and PAL in the sense that they share some characteristics of analog NTSC and PAL standards. Basically PAL-DV is 720x576 frames at 25 fps (50 fields/sec) while NTSC-DV is 720x480 at 29.97 fps (59.9.. fields/sec). Also the chroma subsampling is different: 4:2:0 for PAL and 4:1:1 for NTSC. Given that you may (i) convert PAL-DV to NTSC-DV using a software converter as Robert Keterson mentioned, and then transcode to NTSC-DVD. The quality would depend on the conversion tool.. Unless you use one of those $$$ motion compensating conversions tools, I think option (ii) below is as good as this one. (ii) de-interlace your PAL-DV source, scale it to 720x480, mpeg2enc as a 24fps movie (actually, 24000/1001), and multiplex with audio stretched by 25/24 using sox, for example. Of course, you lose some details by de-interlacing. This can be done using the mjpegtool chain as: lav2yuv movie.avi | yuvdenoise -I | yuvscaler -O SIZE_720x480 | mpeg2enc -F 1 -a 2 -p .... (or -a 3 if you have 16:9) These days I use y4mscaler -I norm=NTSC -I chromass=420_PALDV -O preset=DVD instead of yuvscaler. (iii) Remain in the PAL land and make a PAL-DVD -- most NTSC dvd players I have come across play PAL DVDs just fine (ie on an NTSC TV), but some scale the picture correctly, some simply drop lines 480 to 576, thus vertically stretching the movie.. I have used (i), (ii) and (iii) with "acceptable" results.. YMMV. > As for the region, it should be Ok, I burn my own DVD. Selva ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
