> That's what I thought. So basically, if I understand you correctly > the only application of such a lossless re-encoding would be to > do a sort of "injection" of additional video material into an existing > DV frame.
That's for sub-frame re-encoding. Yes, I'm not sure how much of a benefit it would have, due to macroblocks in each video segment being scattered all over the frame. The original poster was complaining about image quality getting worse after several re-compressions. This is a valid point to consider, since not all editing systems and workflows are good at preserving already-compressed frames. It is also a common benchmark that people use to compare codecs. (although personally I have no motivation to work on this, since I don't use DV as a master format anymore). > I've fixed that. Everything that doesn't require a knowledge of > frame counting or audio is now being inserted by a codec, not by > a muxer. The only pieces left are those having to do with audio. > Or may be you're saying that even this is not good enough for your > application ? Good, I wasn't aware of that change. The DV stream does need to have embedded audio though. Otherwise there will be no audio when it is played out to a FireWire device. When Quicktime applications play to FireWire, they don't insert the audio based on the MOV audio track, they just play the raw DV stream. (it's confusing because desktop software like Quicktime Player DOES play the MOV audio track, ignoring the embedded audio. But if you try to record the file to DV tape, it only transmits the embedded DV stream). Regards, Dan ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
