trycoon wrote:
> After testing Media recorder I can say that recording PAL (720x576) is not possible with my O2, ...
It can, but you need to use the right settings: QT, 2-field SGI JPEG, constant bitrate (disk based 3MB/sec).
However, MR is flakey. It works better with dmrecord.
> recorder does not use the ICE-acceleration or just that it does'nt use the dmrecord commandline program?
The latter; it does use ICE but it's not simply calling dmrecord. There's a weird mix of relationships between the various libs, command line tools and GUI tools, especially how MovieMaker works.
I have done successful capture with MediaRecorder, including from VHS (TBC helps or something to clean up the signal), but something about how its interface works makes the process of choosing the settings a bit klunky. It probably works better with Premiere, though I've never tried it. Or one could use Avid perhaps; I did this long ago but I think it was with AV2. It worked ok with no frame drop, but the general responsiveness was much better with an Octane (I was comparing an R12K/400 O2 AV2 to an R12K/400 Octane MXE DIGVID).
Recently I did some experiments with MovieMaker/Premiere and DV format files; O2 fared rather well compared to other SGIs, especially for playback, though of course Octane, Fuel, etc. have an edge for file loading. However, export times are a much larger proportion of a typical job, so O2 wins overall despite slower loading times, and it's the only SGI that offers solid real-time playback (or there's Cosmo of course for Indy, Indigo2 and MGRAS Octane, but that's less flexible and expensive, though Cosmo is supremely reliable with dmrecord). Other systems must use different libs though (which on non-O2 systems seem to chew a lot of RAM with MovieMaker, while also exhibiting some curious errors sometimes), and I suspect (at least for DV) the libs on O2 used by MovieMaker are not the same libs used by Premiere. Am working on a longer writeup atm to add to my site.
Using an O2 for capture is certainly fun, but I do have a USB dongle I use aswell which works very nicely, or sometimes a Cosmo2 I2 which copes with noisy signals very well. Funny thing though, the simple editing tool supplied with the USB dongle looks and is used in a remarkably similar manner to MovieMaker, and is thus very intuitive.
I do of course use a PC for final format conversion to h264/h265 (NVEnc with a 1080 Ti, which can smash through SD material so long as one has a decent enough CPU to feed it, more cores being relevant; I use a 5700X).
Ian.