Hallo > I once wrote a filter for mplayer that searched for black frames. The > idea was to find the 1 or more frames that most frequently sit between > "content" and the commercials. Have you also taken a look at the lav2yuv secenlist feature ? There lav2yuv splits the inputfile into several scenes. Where is uses a similair approach.
That feature is used in the LVS in the Edit video tab. > Now it struck me that given the format of mjpeg streams, it's really not > necessary to decode each frame before you decide it's not a "black > frame" and because subsequent frames do not depend on previous frames > (as they do in the likes of an MPEG stream), the theory is that one only > needs to decode enough of each frame to determine that it's not a black > frame. Most times this should be doable in the first few scan lines. > This process should be quite efficient! The first few lines are often black if you have 16:9 or a cinema movie. You you have to take a look at the center, oft the first field or something like that. > So my question is, how well does the framework of the mjpegtools match > the theory? Could I write a "searcher" using the framework that is > already present in the mjpegtools suite to only decode enough of a frame > to decide that it's not a black frame and then move on to the next > frame? I think you should take a look at lav2yuv, maybe it does something like you want. So you can easy chack if it is usefull, and may be adapted. Search for: param.scenefile lav2yuv.c sarting with line 133, in the CVS version. auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
