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4K Resolution scaling problem with TIFF images

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#1 ortelius
Hi,

I am using original resolution TIFF files generated by LR and render the sequence with LRTimelapse to 4K (4096x2304, ProRes 422). While uploading some footage to Videoblocks, I get an error because the resolution is not exactly 4096x2304px.

Example:

Original resolution of the TIFF images (aspect ratio 16:9) generated by LR:

5220 x 2936 px

----------------------------
Error from Videoblocks:
Invalid Resolution (4096.348773841962x2304)
---------------------------


This is exactly the resolution you get by down scaling 5220 x 2936 px to 2304px high without rounding. This problem does not happen for sequences rendered from JPEG files in original resolution...

The render option 'Force output to 16:9' in LRT does not make any difference. Possibly exporting TIFF images in LR with 4096 x 2304 px may be the solution, but I want to keep to source file resolution as large as possible.

Thanks for any help!

Rainer
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#2 Gunther
Which resolution did you choose in the LRTimelapse render dialog?
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#3 ortelius
I'm using 4096x2304 in LRT render dialog.

Just have seen exporting from LR in TIFF is only possible in original resolution. So no option for my problem.
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#4 Gunther
Hmm, I've tried to reproduce that but couldn't yet.
I've exported a 16:9 cropped sequence via LRTExport as TIFF intermediaries and then rendered as ProRes 422. When checking the Width and Height of the MOV file via MPC player (VLC should do too), I get exactly 4096x2304.

Could you please tell me which settings you used in the LRTimelapse render dialog?
Could you try checking the dimensions/properties of the files in your player?


Code:
Format                         : MPEG-4
Format profile                 : QuickTime
Codec ID                       : qt  
File size                      : 1.45 GiB
Duration                       : 13s 347ms
Overall bit rate mode          : Variable
Overall bit rate               : 935 Mbps
Encoded date                   : UTC 2016-09-04 09:03:33
Tagged date                    : UTC 2016-09-04 09:03:33
Writing application            : Lavf56.26.101

Video
ID                             : 1
Format                         : ProRes
Format version                 : Version 0
Format profile                 : 422
Codec ID                       : apcn
Duration                       : 13s 347ms
Bit rate mode                  : Variable
Bit rate                       : 935 Mbps
Width                          : 4 096 pixels
Height                         : 2 304 pixels
Display aspect ratio           : 16:9
Frame rate mode                : Constant
Frame rate                     : 29.970 fps
Color space                    : YUV
Chroma subsampling             : 4:2:2
Scan type                      : Progressive
Bits/(Pixel*Frame)             : 3.304
Stream size                    : 1.45 GiB (100%)
Writing library                : fmpg
Language                       : English
Encoded date                   : UTC 2016-09-04 09:03:33
Tagged date                    : UTC 2016-09-04 09:03:33
Matrix coefficients            : BT.601
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#5 ortelius
Thanks for checking.

These are my render settings for a cropped TIFF sequence. The TIFF images have been generated by LRTimelapse export plugin from LR,  cropped from Canon .cr2 files with 16:9 aspect ratio. Image size in this case is 5193x2921 pixels.

[Image: https://s10.postimg.org/hxmifwlwl/render_settings_1.jpg]

This is the properties dialogue box of the MPC player (Shift+F10) for this sequence:

[Image: https://s3.postimg.org/amfwef6cf/preferences_mpc.jpg]

It shows 4096x2304 pixels, but this seems to be rounded and positions after decimal point are not shown. But it gives a value for the aspect ratio if it is not exactly (16:9) -> in this case (262136:147447).

In case of JPEG rendering, no aspect ratio is shown in the lower box, since it is exactly (16:9):

[Image: https://s21.postimg.org/b6ztr87mb/prefer...m_jpeg.jpg]

No difference if 'Force output to 16:9' box is checked or not.
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#6 Gunther
Could you please send me 2 or three of those Canon RAW files including their XMP files via Dropbox or Wetransfer.
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#7 Gunther
After analyzing this I found that the sequences are all being rendered in the correct and exact 16:9 ratio. The only thing that could happen is, that the aspect ratio itself is being written as a weird fraction into the metadata by the encoder.
In the next update (4.7.2) I will force the ar-metadata to be written as 16:9 into the file, so that your stock agency will accept them.
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#8 ortelius
Thanks a lot for your fast support and hard work, Gunther. Problem solved for me, Videoblocks accepting the sequences now.

Rainer
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#9 Gunther
Remark: Rainer has got a beta version with the fix from me. If anyone else needs this before the next official update, please let me know.
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#10 disasterdom
hi guys, i have just encountered this problem as well. i am using a nikon camera. Uploaded a clip to video blocks and got rejected with this message "[font=Roboto, sans-serif]Invalid Resolution (4096.254409937888x2304); For mp4 formats, footage must have one of the following resolutions: [3840x2160, 4096x2160, 4096x2304]."[/font]

...also check out: