Hi all, Preparing one more Gem video perf with circus. :) (the 4th!)
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
What would you guys recommend, if I want to use a nice miniDV camera ? It could either be a composite (BNC cable) capture card under GNU/Linux or the Firewire uner Mac OS X.
I think that the BNC cable is more flexible an easier to handle than the Firewire. It can also be very long, and that suits my needs, since it gives more flexibility to the cameraman.
Thanks !
Le jeudi 15 novembre 2007 à 18:47 -0500, Alexandre Quessy a écrit :
Hi all, Preparing one more Gem video perf with circus. :) (the 4th!)
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
What would you guys recommend, if I want to use a nice miniDV camera ? It could either be a composite (BNC cable) capture card under GNU/Linux or the Firewire uner Mac OS X.
I've got a conexant BTxxx capture chip on a PCI board. I think the problem of the analog capture card its the poorer image quality than Firewire. And delay is quite noticeable to my opinion even on a linux box.
I think that the BNC cable is more flexible an easier to handle than the Firewire. It can also be very long, and that suits my needs, since it gives more flexibility to the cameraman.
There is also the firewire over optic fibre solutions: one of the dance companies Iw ork with purchased one, and it has an excellent image quality and very low delay over a 100m fiber. The fiber is actually more flexible than a cooper coax cable and a lot lighter. The prob with BNC is the weight of the cable itself which tends to damage the camera/peripheral connectors after a while.
See http://www.kramerelectronics.com/indexes/item.asp?name=648 for one of the cheapest FW over optic fibre solutions around in France. ++ O.
I think your problem may not be in the driver but in the fact that you are using DV which compresses both at the camera and in your computer bus... (i believe...) I am also looking for the best (and cheapest) solution for latency. you should check uncompressed firewire options.
The conexant 878 chip seems to be the fastest one that i've tried so far to capture analog video. it's a 20$ PCI tv tuner
J
On 11/15/07, Olivier Heinry olivier.heinry@manga-burgah.net wrote:
Le jeudi 15 novembre 2007 à 18:47 -0500, Alexandre Quessy a écrit :
Hi all, Preparing one more Gem video perf with circus. :) (the 4th!)
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
What would you guys recommend, if I want to use a nice miniDV camera ? It could either be a composite (BNC cable) capture card under GNU/Linux or the Firewire uner Mac OS X.
I've got a conexant BTxxx capture chip on a PCI board. I think the problem of the analog capture card its the poorer image quality than Firewire. And delay is quite noticeable to my opinion even on a linux box.
I think that the BNC cable is more flexible an easier to handle than the Firewire. It can also be very long, and that suits my needs, since it gives more flexibility to the cameraman.
There is also the firewire over optic fibre solutions: one of the dance companies Iw ork with purchased one, and it has an excellent image quality and very low delay over a 100m fiber. The fiber is actually more flexible than a cooper coax cable and a lot lighter. The prob with BNC is the weight of the cable itself which tends to damage the camera/peripheral connectors after a while.
See http://www.kramerelectronics.com/indexes/item.asp?name=648 for one of the cheapest FW over optic fibre solutions around in France. ++ O.
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
Le jeudi 15 novembre 2007 à 20:23 -0800, Jaime Oliver a écrit :
I think your problem may not be in the driver but in the fact that you are using DV which compresses both at the camera and in your computer bus... (i believe...) I am also looking for the best (and cheapest) solution for latency. you should check uncompressed firewire options.
Coud you name a few?
The conexant 878 chip seems to be the fastest one that i've tried so far to capture analog video. it's a 20$ PCI tv tuner
I'm sorry it's a PCI card now my main machine is a laptop!
On 11/15/07, Olivier Heinry olivier.heinry@manga-burgah.net wrote:
Le jeudi 15 novembre 2007 à 18:47 -0500, Alexandre Quessy a écrit :
Hi all, Preparing one more Gem video perf with circus. :) (the 4th!)
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
What would you guys recommend, if I want to use a nice miniDV camera ? It could either be a composite (BNC cable) capture card under GNU/Linux or the Firewire uner Mac OS X.
I've got a conexant BTxxx capture chip on a PCI board. I think the problem of the analog capture card its the poorer image quality than Firewire. And delay is quite noticeable to my opinion even on a linux box.
I think that the BNC cable is more flexible an easier to handle than the Firewire. It can also be very long, and that suits my needs, since it gives more flexibility to the cameraman.
There is also the firewire over optic fibre solutions: one of the dance companies Iw ork with purchased one, and it has an excellent image quality and very low delay over a 100m fiber. The fiber is actually more flexible than a cooper coax cable and a lot lighter. The prob with BNC is the weight of the cable itself which tends to damage the camera/peripheral connectors after a while.
See http://www.kramerelectronics.com/indexes/item.asp?name=648 for one of the cheapest FW over optic fibre solutions around in France. ++ O.
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
I know I have the same problem!! laptops...
anyway
I am trying to get a hand on a point grey to run tests....
I found this page that lists uncompressed firewire cameras: http://damien.douxchamps.net/ieee1394/cameras/index.php
This one seems to have the best pfs for the price (199$), it's called firefly MV, however I will continue the search:
http://www.ptgrey.com/products/fireflymv/index.asp http://www.ptgrey.com/products/fireflymv/fireflymv.pdf http://www.ptgrey.com/products/Point_Grey_imaging_catalog.pdf
good luck and if you get good fps for good price with uncompressed firewire let me know...
best,
J
On 11/15/07, Olivier Heinry olivier.heinry@manga-burgah.net wrote:
Le jeudi 15 novembre 2007 à 20:23 -0800, Jaime Oliver a écrit :
I think your problem may not be in the driver but in the fact that you are using DV which compresses both at the camera and in your computer bus... (i believe...) I am also looking for the best (and cheapest) solution for latency. you should check uncompressed firewire options.
Coud you name a few?
The conexant 878 chip seems to be the fastest one that i've tried so far to capture analog video. it's a 20$ PCI tv tuner
I'm sorry it's a PCI card now my main machine is a laptop!
On 11/15/07, Olivier Heinry olivier.heinry@manga-burgah.net wrote:
Le jeudi 15 novembre 2007 à 18:47 -0500, Alexandre Quessy a écrit :
Hi all, Preparing one more Gem video perf with circus. :) (the 4th!)
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
What would you guys recommend, if I want to use a nice miniDV camera ? It could either be a composite (BNC cable) capture card under GNU/Linux or the Firewire uner Mac OS X.
I've got a conexant BTxxx capture chip on a PCI board. I think the problem of the analog capture card its the poorer image quality than Firewire. And delay is quite noticeable to my opinion even on a linux box.
I think that the BNC cable is more flexible an easier to handle than the Firewire. It can also be very long, and that suits my needs, since it gives more flexibility to the cameraman.
There is also the firewire over optic fibre solutions: one of the dance companies Iw ork with purchased one, and it has an excellent image quality and very low delay over a 100m fiber. The fiber is actually more flexible than a cooper coax cable and a lot lighter. The prob with BNC is the weight of the cable itself which tends to damage the camera/peripheral connectors after a while.
See http://www.kramerelectronics.com/indexes/item.asp?name=648 for one of the cheapest FW over optic fibre solutions around in France. ++ O.
PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
On 16 Nov 2007, at 10:47 AM, Alexandre Quessy wrote:
I didn't like much using Firewire (ieee1394) under GNU/Linux, since the driver is pretty slow.
As I understand it, if you are using DV codec with firewire you are
going to get several frames delay (on any OS) - I guess this system
is optimised for capturing media for editing, favouring accuracy
rather than latency, not so good for real-time use. I have tried many
different combinations of DV camera and capture system, always there
are several frames delay with DV. Composite capture cards can be much
faster, and can be better resolution too - but they get very
expensive for higher resolutions. Without locking the camera's
framerate and the capture card together you are always going to get a
frame or more delay. Very high end digital mixing systems have a
exactly one frame delay, allowing for processing the signal etc and
all the cameras are locked in sync.
I settled on a PCI framegrabber from Eurosys, not cheap but quite
nice, and get a delay of less than 2 frames - just fast enough to get
away with putting the image of a performer speaking up onstage
without the sync between live voice and image being too bad.
simon
-
Alexandre Quessy -
Jaime Oliver -
Olivier Heinry -
simon wise