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Frame Rate Discrepancy
NMHUCOWBOY [Avatar]
Newbie Joined: Nov 12, 2016 16:46 Messages: 5 Offline
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I have a Canon XF305 camcorder. When I have made a video I use a Canon XF Utility to move or copy the .MXF files to my computer. Then I use a BORESOFT MXF converter progam to create .mpg (mpeg-2) files of each of the clips. This has to be done first before I have something I may edit in power director. Once Power Director has imported the new .mpg files I use PD14 to merge all of the clips into one file and add any needed titles or effects. Then I save the newly constructed file back to the computer.

PD14 imports the .mpg files OK but when adding a clip to the timeline I get this error: "Timeline frame rate conflict". It appears that the imported .mpg files are at 29.97 fps and PD is set to 30 fps creating a conflict. Once the project is completed the end product shows tearring or shearing of the video when the camera is moving, most likely due to the frame rate conflict. I don't think my PD14 program is automatically adjusting for this issue as mentioned elsewhere in this forum.

Here are some details:XF305 camera settings: 50 Mbps, 1920 x 1080, 60i.
[Thumb - Clip_properties.jpg]
 Filename
Clip_properties.jpg
[Disk]
 Description
mpg Clip Properties
 Filesize
88 Kbytes
 Downloaded:
26 time(s)
[Thumb - Frame_Rate_Conflict.jpg]
 Filename
Frame_Rate_Conflict.jpg
[Disk]
 Description
Frame Rate Conflict error
 Filesize
84 Kbytes
 Downloaded:
24 time(s)
[Thumb - Shearing.jpg]
 Filename
Shearing.jpg
[Disk]
 Description
Shearing Effect
 Filesize
170 Kbytes
 Downloaded:
24 time(s)
NMHUCOWBOY [Avatar]
Newbie Joined: Nov 12, 2016 16:46 Messages: 5 Offline
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To further help I have attached a picture of the .MXF file properties that the Canon Utility made. It shows the bit rate to be: 59.94i. The file plays very well in the XF utility, however when the MXF file is converted to mpeg2 and the mpeg2 clips are joined in PD14 as a project, we get the rips or shearing. The individual mpeg2 clips created from the BRORSOFT MXF converter appear to work and look just fine.

I could use the MXF converter program to join the mpeg2 clip files, however I would not have the benefit of adding transition effects, fades, enhancements, titles, etc. in the PD14 program.

Hope this helps.
[Thumb - MXF_Clip_properties.jpg]
 Filename
MXF_Clip_properties.jpg
[Disk]
 Description
MXF Clip properties
 Filesize
383 Kbytes
 Downloaded:
25 time(s)

This message was edited 1 time. Last update was at Nov 26. 2016 19:20

JL_JL [Avatar]
Senior Contributor Location: Arizona, USA Joined: Oct 01, 2006 20:01 Messages: 6091 Offline
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Quote PD14 imports the .mpg files OK but when adding a clip to the timeline I get this error: "Timeline frame rate conflict". It appears that the imported .mpg files are at 29.97 fps and PD is set to 30 fps creating a conflict.

This error is actually stating the opposite if you read your pic. The timeline is 30NTSC which is 29.97fps interlaced and your imported video from BORESOFT MXF converter is 30fps progressive, that's the conflict PD is cautioning you about.

I’d probably try to be a little bit more consistent with fps vs doing a bunch of conversions. To me it looks like you have:
1) 59.94fps Interlaced camera (source)
2) 30fps progressive after BORESOFT MXF converter
3) You don’t mention what format you produced to in PD for the tearing, but more than likely a 29.97fps interlaced variety

That’s a lot of fps and interlaced to progressive conversions that just leads to trouble. Not knowing your intended end use of your video it’s a little hard to recommend a more streamlined path. I’d probably:
1) change your settings in your MXF converter to create a H.264 (59.94i) format to match camera source
2) in PD pref > General > Timeline frame rate: to 60 NTSC (59.94i)
3) see if Intelligent SVRT on the “Produce” tab will provide a reasonable format suggestion to match source video. If not you will need to create a custom one based on the H.264 and set the 59.94i (shown in pic).

This keeps your recorded camera source of 59.94i framerate throughout the PD edit and produce process. See if the above provides any better quality.

Jeff
[Thumb - PD14_59.94i.png]
 Filename
PD14_59.94i.png
[Disk]
 Description
 Filesize
97 Kbytes
 Downloaded:
22 time(s)
NMHUCOWBOY [Avatar]
Newbie Joined: Nov 12, 2016 16:46 Messages: 5 Offline
[Post New]
Quote
Quote PD14 imports the .mpg files OK but when adding a clip to the timeline I get this error: "Timeline frame rate conflict". It appears that the imported .mpg files are at 29.97 fps and PD is set to 30 fps creating a conflict.

This error is actually stating the opposite if you read your pic. The timeline is 30NTSC which is 29.97fps interlaced and your imported video from BORESOFT MXF converter is 30fps progressive, that's the conflict PD is cautioning you about.

I’d probably try to be a little bit more consistent with fps vs doing a bunch of conversions. To me it looks like you have:
1) 59.94fps Interlaced camera (source)
2) 30fps progressive after BORESOFT MXF converter
3) You don’t mention what format you produced to in PD for the tearing, but more than likely a 29.97fps interlaced variety

That’s a lot of fps and interlaced to progressive conversions that just leads to trouble. Not knowing your intended end use of your video it’s a little hard to recommend a more streamlined path. I’d probably:
1) change your settings in your MXF converter to create a H.264 (59.94i) format to match camera source
2) in PD pref > General > Timeline frame rate: to 60 NTSC (59.94i)
3) see if Intelligent SVRT on the “Produce” tab will provide a reasonable format suggestion to match source video. If not you will need to create a custom one based on the H.264 and set the 59.94i (shown in pic).

This keeps your recorded camera source of 59.94i framerate throughout the PD edit and produce process. See if the above provides any better quality.

Jeff




Thank you for the suggestions Jeff. It will be a few days before I can check this out but it sounds like a good plan. For HD the MXF files are huge...about 20 to 24 Gb per hour. I just wanted to do some editing and make the files a little smaller. Hopefully, this will work.
JL_JL [Avatar]
Senior Contributor Location: Arizona, USA Joined: Oct 01, 2006 20:01 Messages: 6091 Offline
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Quote
Thank you for the suggestions Jeff. It will be a few days before I can check this out but it sounds like a good plan. For HD the MXF files are huge...about 20 to 24 Gb per hour. I just wanted to do some editing and make the files a little smaller. Hopefully, this will work.

20 to 24GB, yes I realize that, earlier you stated "XF305 camera settings: 50 Mbps, 1920 x 1080, 60i". So 50Mb/sec*1B/8b*3600sec/hr=22.5GB/hr For great quality footage ~25GB/hr is really nothing by todays standard, 4, 6 or 8TB drives go a long way.

If it was me I'd keep as near to camera resolution as I can going into PD and then only downgrade once on final production (whatever format that is for you). Not only the fps issue, you also downgraded your source from 50Mbps to 24Mbps MPEG2 in your BORESOFT MXF converter and then maybe yet again with whatever format you produced to in PD.

In my view you have both fps and bitrate issues that compromise end result quality. A very good camera, take advantage of what it can record.

Jeff
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