Decreasing compression quality when exporting

[Daytonagrl24]

Hi,

I have ProX3 and am trying to create .mov PhotoJPEG video clips. I'm trying to decrease the compression quality since I'm uploading these clips to stock video footage websites. However, when I go to export the video, under the Compression screen the Quality area is grayed out at 100% and won't let me move the tab over to decrease it. Any suggestions on how to change it?

[lata]

Hi

The Speed ---Quality slider affects the way the encoder reads the files, Although that may affect the final quality it will not affect the file size.
At 100% the encoder will take longer to create the file.
Normally you would adjust the Data Rate to control quality against file size.
Photo-Jpeg does not seem to allow this and indeed reflects in the size or the files.

Do you specifically require Photo-Jpeg compression?

If you require a smaller file size try the Mov—Mpeg4 Visual

[Daytonagrl24]

Hi Trevor, thanks for the tips. Yes, unfortunately I submit videoclips to istockphoto.com and they require a PhotoJPEG or MotionJPEG format only. I was hoping to bring the file sizes down somewhat because a 15 second clip rendered at 100% quality in PhotoJPEG is taking 15 mins or more to upload to the site. I suppose changing the video width and height could speed up the process? I'm completing them at 1920x1080 right now. Would changing it to 720x480 help?

[Daytonagrl24]

Does anyone know if changing the video height and width size can help with compression quality issues? Instead of doing 1920x1080, create 720x480?

[lata]

It does seem strange that you are limited to these two formats.
Photo Jpeg is a Quicktime Mov type, as far as I know

I have a Lumix camera that records to Photo-Jpeg at 250Mb per minute, now that to me is extremely high. I convert these to Mpeg4 at 35 MB for upload to You Tube. 1280 x 720

If your original video files are HD then they are widescreen 16:9.
By the way can you tell us what are the properties of the original files.

Converting these to 720 x 480 is downscaling the HD to SD and with it the quality. You may also be changing the aspect ratio from 16:9 to 4:3 which may result in black borders?
If you wish to downscale then use 1280 x 720. (16:9)

Further reduction to 512 x 288 would retain the aspect ratio 16:9, what the quality would be like is anybodies guess. Run a few tests.
I doubt if changing the frame size is going to impact on the file size, you would have to change the compression type.

Update, I just tried 512 x 288 and the file was larger than the original at 344Mb, remember that’s one minute of video. don’t use Photo-Jpeg.

I assume by now you have tried a few options.?