A professional video engineer has 50 k$ devices as 'Scopes', Text Picture Generators, etc.pp. We don't. But we have creativity. Honorable forum member Euisung Lee had a very clever idea: if you want to check interlaced video, you need a video where the odd lines have one color, the even another. As Red/Green/Red/Green/Red/Green/… So, fire up your Paint app (here: Pixelmator), create a new document, res: 1920x1080 (you did know that…). Now, the boring part: select a stencil of 1 pixel (!) size, choose color Red, draw a horizontal line on the very top. draw a second line, but leave one line, 1 pixel wide, free.. switch color to green, draw a line inbetween the two red and draw a second green line under the last red.. pheewww... select all, copy, paste.. = hey, 16 lines.. 1064 left.. select all, copy, paste.. = hey, 32 lines.. ... ok, you got the idea.. 2nd method: goto our download section, I made a red-green.png for your own tests.. another nice tool is a 'Siemens Star' - make a mov out of it, and control 'detail' - template in the DL-section, mentioned above. BUT THAT IS NO MOVIE! .. psssst, soon. drop in red-green.tiff select all, duplicate file = two tiffs. select all, duplicate file = four tiffs. select all, duplicate file = eight tiffs. … you got the idea.. for a 5sec movie, we need.. x30fps = 150 frames! now, launch QTpro, choose 'Open Image Sequence', select first tiff in your folder. QTpro asks for framerate, we say 30fps - tadaahh: a 5 sec movie, showing red and green lines .. now, Export, choose AIC, interlaced, 1920x1080.. WE HAVE A 5SEC AIC ENCODED .mov! quite simple: if ANYWHERE a conversion into p happens or a reducing in resolution to 960x540, those red/green lines will 'vanish'!! and some ugly 'brownie' will appear.. or a plain red or green video (=one field doubled) occurs.. .. nice idea, Euisung!! Siemens Star… another, more engineer based approach: the Siemens Star (Siemens was a German engineer, first electric car etc., but he did NOT invent this chart.. ). (too small! just an illustration. for test purposes, goto the download section) Dramatized example: If the output looks like this, 'something' did happen with resolution. ok, the two different fields/one color missing method is more obvious.. we will use this when we compare iMHD6 and iM09 on handling DV + 'effects'. Theory: effects are allways progressive. And we have to find out, wether that happened in iMHD6 too.. |





