sebazvideo
4th May 2010, 18:50
I've tried long and hard to search for this but all I get is bits and pieces and conflicting information. I would like to know what are the blu-ray legal parameters to set in x264, especially when it comes to GOP size, both for 23.98 fps and for 29.97 fps, and what changes exactly when encoding for BD5 and BD9 as opposed to BD25 and BD50.
I know one of the changes is the VBV Buffer size and maximum bitrate, that they have to be way lower if encoding for BD 5 or 9, but I have been searching to know exactly what do they have to be for a bitrate of 20 Mbps and I found many people saying that it should be 25000, others that it should be 20000 and others 14000. This is only for BD5 or 9, I think that for regular BD the preset 30000 and 40000 are good. I've been using 20000 for both when encoding at 20 Mbps, and the files play fine in my blu-ray player, but I don't know if they will on every player that I may have in the future, or that friends may have, so I want to get as format legit as possible.
But then I really would like to find out what are the legit GOP sizes for 23.98 and 29.97 interlaced. MeGUI shows this recommended value of 250 and 25, which seems a little high to me, and besides those numbers seem like they're meant for PAL, not NTSC. I tried encoding in 300-30 but it makes the resulting file rather hard to search, not to mention that both Encore and DVD Architect spit it out with buffer underflows.
Now, Encore is a lot more accepting of x264 encodes, but DVDA rejects most of them, either by showing them as needed to recompress in the optimize disc settings, or to show them as OK but then stopping on building the project because of an underflow. So I would like to find a way to make encodes that are blu-ray legit and that both Encore and DVDA can take without problems. All of my encodes come from 29.97 interlaced and 23.98 shot with a AVCHD camcorder and edited in Edius Neo Booster and some in Vegas 9.
I can't seem to find this, but is there a website or a PDF with blu-ray legal specifications regarding all these parameters? Or at least, some program that will analyze a mts stream and show exactly what settings were used. I'm not talking about "header" information that MediaInfo shows, but a program that scans the whole file and shows the GOP size, the # of reference frames, the VBV buffer and max bitrate, if it has slices, and what other parameters were used.
Thanks
I know one of the changes is the VBV Buffer size and maximum bitrate, that they have to be way lower if encoding for BD 5 or 9, but I have been searching to know exactly what do they have to be for a bitrate of 20 Mbps and I found many people saying that it should be 25000, others that it should be 20000 and others 14000. This is only for BD5 or 9, I think that for regular BD the preset 30000 and 40000 are good. I've been using 20000 for both when encoding at 20 Mbps, and the files play fine in my blu-ray player, but I don't know if they will on every player that I may have in the future, or that friends may have, so I want to get as format legit as possible.
But then I really would like to find out what are the legit GOP sizes for 23.98 and 29.97 interlaced. MeGUI shows this recommended value of 250 and 25, which seems a little high to me, and besides those numbers seem like they're meant for PAL, not NTSC. I tried encoding in 300-30 but it makes the resulting file rather hard to search, not to mention that both Encore and DVD Architect spit it out with buffer underflows.
Now, Encore is a lot more accepting of x264 encodes, but DVDA rejects most of them, either by showing them as needed to recompress in the optimize disc settings, or to show them as OK but then stopping on building the project because of an underflow. So I would like to find a way to make encodes that are blu-ray legit and that both Encore and DVDA can take without problems. All of my encodes come from 29.97 interlaced and 23.98 shot with a AVCHD camcorder and edited in Edius Neo Booster and some in Vegas 9.
I can't seem to find this, but is there a website or a PDF with blu-ray legal specifications regarding all these parameters? Or at least, some program that will analyze a mts stream and show exactly what settings were used. I'm not talking about "header" information that MediaInfo shows, but a program that scans the whole file and shows the GOP size, the # of reference frames, the VBV buffer and max bitrate, if it has slices, and what other parameters were used.
Thanks