I've followed the interesting thread 'choosing a video camera compatible
with linux'. In my case I already have some (most) video equipments and
tape video sources. Currently I am preparing a workstation/server
upgrade for NLE and playback/streaming.
As I have several questions I choose to start a new thread for this
extended and related topic.
*Video equipments:
Sony TR2000E Hi8 PAL, tapes, S-video out
Sony FX7E 1080i50 HDV, tapes, Firewire and HDMI out
Datavideo DN300 DV (.avi) & HDV (.m2t) 250Mb HDD-recorder
w/S-video/DV-converter and 1394
*Workstation/server:
ATX midi tower w/1394 Firewire and SCSI PCI boards, 36 GB 10k SCSI
system disk, DVD+RW burner
New upgrades:
Mainboard: Asus M4N68T-M LE, Nforce 7025, AM3 socket
CPU: AMD Athlon II X3 445, 3.1 GHz, L" 1.5 Mb
Memory: 4 GB DIM DDR3, 1333 MHz
Hard disks: 2x500 GB SATA, 7.2k
BD-RE burner: LG BH10LS30 Super Multi Blue SATA drive
Q1
Does NLE/rendering on Linux like w/Cinelerra require uncompressed video
(source, intermediate or during work) storage on hard disk, or can
compressed video like native DV25 and M2T formats be used directly as well?
Q2
Which practical 'common standard and open' video capture and storage
format/codec will be recommended, when the purpose is to keep the
original quality of Hi8 and HDV 1080i50 sources on tape during NLE and
playback/streaming from hard disk: DV, M2T, H264, WebM/VP8, other?
Q3
I also consider buying the mentioned BMD Intensity board (or preferably
BMD Shuttle, but BMD tells Linux doesn't yet support USB3 isochronous
transfers for the latter). However I'm unsure if and possibly which real
benefits HDMI capturing will offer over my current 1394 S-video/DV
(.avi) or native HDV (.m2t) capturing?
Q4
Recorded HDV is read to be 8-bit, 4:2:0 MPEG-2 compressed data, no
matter the connection path. Camcorder playback and MPEG-2 decoding
should send up-sampled/interpolated 4:2:2, 8 bit YCbCr uncompressed
video via the FX7E camcorder's HDMI port to the Intensity board.
BMD says Media Express (software) can capture uncompressed & MJPEG on
linux. I expect uncompressed 1080i50 8-bit video codec have similar
requirements as 1080i60: very large disk RAID due to transfer rate of
119MB/sec and 417 GB storage per hour.
This tells me that for my purpose the video must be storaged in a
suiteable compressed format/codec as asked in Q2 above. Am I right that
to justify another encodings than
* S-video to DV25 (.avi), the BMD Intensity must have a better A/D
converter than DN-300
* native HDV (.mt2), the camera decoding/up-sampling over HDMI must be
preferable
Q5
Streaming or playback with i.e VLC. What (networked hardware) is needed
in addition to the server to display HD-video on a HDTV?
Rgds,
Terje J. Hanssen
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