Hi Hanssen, > This is real interesting to hear. I think I have the possibility to > output uncompressed 1440x1080i50 as 4:2:2 digital data from my Sony FX7E > camera/EIP via HDMI. Therefore also I plan to buy a BM Intensity Pro, > and have a handful related questions: > > Q1 > Are there other hardware requirements (CPU, RAM etc) to "work with" > (capture, playback, edit, encode, decode) uncompressed 1080i50 YCbCr > 4:2:2 (UYVY) video?
No. Of course a powerfull CPU is desired for encoding, and a RAID-0 is also a need for writing in realtime your uncompressed HD footage. > Q2 > Any especial BM driver setup on Linux to get this to work? > What more features will become available with the next BM Media Express > 2.0 software on Linux? I tested the driver in x86 and in x86_64. There is no Media Express yet for Linux - I just get the raw samples from the card (using my code) and send them using pipes or store them directly to the disk. I think include support for capturing using kino and/or cinelerra is the way to go. > Q3 > To compare with compressed 1080i50 HDV (1440x1080, 4:2:0, 25Mbit/s) > which like DV25 needs disk space about 13GB/hour included audio, what > disk space pr hour is required for uncompressed 1440x1080i50 YCbCr 4:2:2 > (UYVY)? Do the math yourself (last email I did some draft of the arithmetic), but believe - its much more (lets say, ~150Mbit/s). > Q4 > Is uncompressed 1440x1080i50 YCbCr 4:2:2 (UYVY) a suitable or even > native format to edit/render in Cinelerra, and better than using > compressed 1080i50 HDV? probably yes, if you pack it into a mov container. but remember you'll need a fast disk system. > Q5 > Encoding uncompressed 1440x1080i50 YCbCr 4:2:2 (UYVY) with the more > effective x264 compression at a high data rate up to max 40 Mbit/s for > Blu-Ray disks, I expect this should make it possible to get a > considerable higher video quality (especial colors) distribution format > than possible from usual HDV (M2T) (?) probably yes. Cheers, Rafael Diniz > On Tue, Aug 11, 2009 at 12:27 AM, Rafael Diniz <raf...@riseup.net> wrote: > >> hello people, >> I tested the BM Intensity Pro under Linux at work, and it works quite >> well. >> It outputs YCbCr 4:2:2 (UYVY), and I could store a 1080i footage using >> a RAID-0 >> two 320 Gb SATA II 7200rpm normal consumer discs. >> Of course, you can pipe this video output to any encoder, like ffmpeg >> or x264 and >> use a lossless or lossy encoding. >> One other very nice thing is that the card outputs the video synced w/ >> the >> audio, thing that we sometimes miss w/ some analog video capture >> setups in >> linux. >> And of course, the HD video capture using the HDMI port is a very nice >> feature >> to have. >> >> bye, >> rafael diniz _______________________________________________ Cinelerra mailing list Cinelerra@skolelinux.no https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
