Great post. Thanks for the info!
DQS
www.mpenyc.com
1) Why did you convert to DNxHD145 to play them on the laptop? In 1080i (but not 720p/30 or 720p/30N) the native P2 files play back fine (single stream) in Xpro. In fact, you even get DVCProHD output on the system IEEE-1394 port. (Be sure the timeline I/O button is set to"1394"). If you effect them you have to render effects, but that is relatively fast. Also, instead of exiting Avid did you try using File->Refresh Media Directories? As I recall, (can't recheck cause Panasonic wouldn't let me keep the eval HVX200 I had for 3 weeks ) once the Avid MediaFiles\MX\1 directory exists prior to starting XproHD, you could copy P2 files to the directory while Xpro was running and it would automagically update (I saw an alert like "rescanning database" and after it closed, the newly copied clips were useable.)
2) "HD 50 MXF files". What are those? Did you mean DVCProHD MXF files (which are 100 Mbps) or are you talking about DVCPro50 standard def media files? Also, in XPro, 1:1 and 1:1 10 bit are only for standard def (ITU-R bt.601). I don't know about Nitris, but I think the same is true of Adrenaline. To work in HD you would need to use DNxHD 145 (for 8-bit) or DNxHD 220 (for 10-bit) losslessly compressed (like a .zip file) HD. And if you had the files already converted to DNxHD145, are you saying that Nitris couldn't handle them? Sorry, but I'm confused by your point 2).
The only problem I found was that Avid only supports 720P/30 DVCProHD as if it were HDV (a bug I hope is fixed in 5.2.4 or the next update). So 720P/30 P2 clips copied to the media directory cannot be played directly (since they haven't been rendered to HDV). So you have to transcode those files to DNxHD to play them back from within XPro. But all other modes (720P/24 and 720P/24N with and without under-/over-cranking, plus all HVX200 1080 formats and frame rates) played from native P2 files on my system without any trancoding, rendering or converting. (And still do - I still have all the P2 originated DVCProHD clips on my system). So I think your initial playback and media database loading issues come from someplace other than XproHD - assuming you are using version 5.2.3.
wmc -----
1) Why did you convert to DNxHD145 to play them on the laptop? In 1080i (but not 720p/30 or 720p/30N) the native P2 files play back fine (single stream) in Xpro.
I wish that were true, but neither Pro or Nitris would play the native files without awful stutter. Once transcoded they played like lightning. At least in our case.
Also, instead of exiting Avid did you try using File->Refresh Media Directories? As I recall, (can't recheck cause Panasonic wouldn't let me keep the eval HVX200 I had for 3 weeks ">) once the Avid MediaFiles\MX\1 directory exists prior to starting XproHD, you could copy P2 files to the directory while Xpro was running and it would automagically update (I saw an alert like "rescanning database" and after it closed, the newly copied clips were useable.)
Not in our case, but I sure wish it would do that. In fact, most of the time neither Pro nor Nitris could even see the files unless we deleted and rebuilt the database files.
2) "HD 50 MXF files". What are those? Did you mean DVCProHD MXF files (which are 100 Mbps)?
Yes, I was thinking faster than I was typing, sorry for that.
Also, in XPro, 1:1 and 1:1 10 bit are only for standard def (ITU-R bt.601). I don't know about Nitris, but I think the same is true of Adrenaline. To work in HD you would need to use DNxHD 145 (for 8-bit) or DNxHD 220 (for 10-bit) losslessly compressed (like a .zip file) HD. And if you had the files already converted to DNxHD145, are you saying that Nitris couldn't handle them? Sorry, but I'm confused by your point 2).
Nitris was fine with the 145 files, but couldn't handle the untranscoded files any better than Pro, just stutter, stutter, stutter.
Man, if I knew how to get Pro to let me edit non-transcoded 1080i files without stutter, I would be thrilled. And certainly, Avid needs to standardize the addition of MXF files like all others. But don't get me wrong, it worked and we loved it! It just needs some fine tuning...
Dutch AV forumFCP2Avid I hear and I forget. I see and I remember. I do and I understand. - Confucius
OK. Let's back up a ways. When you got the HVX200 did you install the P2 drivers on both the laptop XPro machine and the Nitris? With them installed and running, and with the P2 hooked to a USB v2 port (v2 is a must) when you turn the HVX200 on with P2 inserted, Avid scans them and shows them as seperate media drives with the clips ready to edit. (You can't save back to P2, but you can edit directly FROM P2 as long as your rendering, FX drive etc settings point to other drives.)
On the laptop, it could be drive throughput, but I doubt it since the DNxHD145 played back fine which is 50% more "dense" than DVCProHD100. It almost sounds as if both the laptop and Nitris system are missing a CODEC. If, from an HD Xpro project you File->Export, select QuickTime Movie (not ref) custom settings, does the video settings offer you Avid DV 100 Codec as an option? If not, that could be the problem.
When you created the project to host the P2 media, did you select 1080i/59.94 (or the matching 1080 frame rate you shot at) with MFX as the media type, filtering out the system drive and application drive? (You do have a dedicated media drive, right?) And you did set Video Input tool to the system IEEE-1394, (i.e "Host 1394" not DNA (Mojo - don't know if Nitris sports a 1394 input and if so if it handles DVCProHD codec from/to it or if the Nitiris machine also has to use the system 1394 port) and the timeline I/O gadget is set to "1394" not "DNA". In the case of XPro, it is not mandatory, but a good idea to disconnect Mojo before powering up if you are going to work with the HVX200 P2 cards and clips. (This is especially important if the System IEE-1394 port and the one DNA hardware is connected to run off the same internal bus.)
I think you have a configuration problem on both your machines and are not experiencing problems generic to Avid UNLESS you shot 720P/30. Then everything you report would be consistent with my experiences which I believe came from the absense of an "Avid DV 100" CODEC which supports 720P/30 (i.e. the only HD 720/30 Avid supports in Xpro at the moment seems to be HDV or DNxHD.)
Hey WMCOLE, appreciate your getting involved in this! Responses below:
OK. Let's back up a ways. When you got the HVX200 did you install the P2 drivers on both the laptop XPro machine and the Nitris?
We installed the P2 drivers from go on the laptop. We were dumping the data to had drives attached to the laptop and erasing the cards as quickly as possible so we were ready with them for another take every few takes, then running the laptops up to the Nitris, copying the data to a 3 terabyte Avid disk array.
With them installed and running, and with the P2 hooked to a USB v2 port (v2 is a must) when you turn the HVX200 on with P2 inserted, Avid scans them and shows them as seperate media drives with the clips ready to edit. (You can't save back to P2, but you can edit directly FROM P2 as long as your rendering, FX drive etc settings point to other drives.)
We didn't use a USB v2 port, we plugged them directly into the laptop PCMCIA slot - we thought from everything we read that would be fine, maybe that was the problem, but I didn't find anything about that in any of the literature, maybe that's a good tech tip!
Just checked, it does offer that Codec option.
When you created the project to host the P2 media, did you select 1080i/59.94 (or the matching 1080 frame rate you shot at) with MFX as the media type, filtering out the system drive and application drive?
Yes.
(You do have a dedicated media drive, right?) And you did set Video Input tool to the system IEEE-1394, (i.e "Host 1394" not DNA (Mojo - don't know if Nitris sports a 1394 input and if so if it handles DVCProHD codec from/to it or if the Nitiris machine also has to use the system 1394 port) and the timeline I/O gadget is set to "1394" not "DNA".
Yes, yes and yes.
In the case of XPro, it is not mandatory, but a good idea to disconnect Mojo before powering up if you are going to work with the HVX200 P2 cards and clips. (This is especially important if the System IEE-1394 port and the one DNA hardware is connected to run off the same internal bus.)
Didn't even attach the Mojo I didn't think it would help us with HD.
Since we have that Codec, I'm not sure what's up. I'm sure with some digging it can be resolved. I guess it really boils down to 2 wish list/fixes which are either on our end or Avid's:
I'm stumped.
What mfgr laptop? What were the specs (disk[s], RAM, proc and proc speed)? Is it possible that it is RAM capacity related. (I'm using 2 GB).
Avid Technology, Inc. brands: Digidesign | M-Audio | Sibelius | Pinnacle Systems | Sundance Digital | Softimage
© Copyright 2000-2008 Avid Technology, Inc. All Rights Reserved — Legal Notices | Terms of Use | Privacy Policy | RSS Feeds | Site Map