Skip navigation
JustinWyllie
Currently Being Moderated

Using clips with different frame aspects and pixel aspects in the same project

May 22, 2013 6:47 AM

Tags: #frame #pixel #ratio #aspect #ratios #ration

Hi

 

I have two clips:

 

clip1:     AVCHD 1440 x 1080 and pixel aspect ration of 1.3333 (the frame ratio is 4:3)

clip2:    AVI 720 x 576 and pixel aspect ratio of 1.0940 (the frame ratio is 5:4)

 

I want to use both clips in the same project.

 

I have chosen a project preset suitable for clip1. (in this case most of my footage will be of this format).

 

If I do not make any changes to the pixel aspect ratios (using Interpret footage) the result is that letter boxing is used around clip2. This is acceptable but not ideal.

 

Can I change the pixel aspect ratio of clip2 so that it will be the same proportions as clip1? If I do this however will I not end up distorting clip2? Which would be a worse outcome than the current situation with letter-boxing.

 

Can anyone advise; is it possible to merge these two source clips into one seamless output file?

 

With thanks

 

--Justin Wyllie

 
Replies
  • Currently Being Moderated
    May 22, 2013 7:00 AM   in reply to JustinWyllie

    Or, before you add the standard definition clips to your project, you can go to Edit/Preferences/General and check the Scale to Frame Size option. You video still may not fill your frame side to side, but at least it will top to bottom.

     

    You can also manually enlarge the clip if you want by selecting it on your timeline, opening Applied Effects/Motion and changing its Scale. You can then make it fill your video frame -- but you'll do so by trimming off some of the clip's bottom and/or top.

     

    Regardless, you've also got one other issue. I don't know what you plan to do with your video once you're done editing it but, if you plan to output it as a high-def video (a BluRay for instance), you've got one other problem. Your clip 2 is less than one-fourth the resolution of clip 1 -- so, if your project is set up for your high-def video, enlarging the standard-def video could make it look fuzzy or blurry.

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 7:06 AM   in reply to JustinWyllie

    Justin,

     

    If the PAR (Pixel Aspect Ratio) of Clip 2 is correct, i.e. the footage does not look stretched, or squeezed, I would not make any adjustments to that.

     

    To reduce, or completely remove the black bars around it, you can adjust the Fixed Effect>Motion>Scale, to fill the larger Frame Size. Note: because of the difference in the footage's Frame Aspect Ratio, to fill the full Frame of the Project, you will effectively crop off some of the top and bottom. By using the Fixed Effect>Motion>Position, you can adjust exactly where the cropping takes place, say all from the top, or all from the bottom, or by a different ratio of top & bottom. That choice should be predicated by the framing of the subject in Clip 2. That choice is yours.

     

    Note: when Scaling up, quality will decrease, though possibly not by too much to use that footage, but the decision is also yours. There are several programs, and some that are plug-ins, that up-rez a bit better than Motion>Scale in PrE. I would investigate those. One, Red Giant's Magic Bullet Instant HD, has been used by many, though some users were not pleased enough to purchase it. Just something to consider.

     

    Good luck,

     

    Hunt

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 8:38 AM   in reply to JustinWyllie

    Justin,

     

    You are most welcome.

     

    If you encounter any problems, or have questions, please do not hesitate to drop back by.

     

    Good luck, and happy editing,

     

    Hunt

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 10:15 AM   in reply to JustinWyllie

    JustinWyllie

     

    You wrote:

     

    I have two clips:

     

    clip1:     AVCHD 1440 x 1080 and pixel aspect ration of 1.3333 (the frame ratio is 4:3)

    clip2:    AVI 720 x 576 and pixel aspect ratio of 1.0940 (the frame ratio is 5:4)

     

    I want to use both clips in the same project.

     

    Based on the above, your "display aspect ratio" is going to be either 4:3 and 16:9.

    In the case of the AVCHD 1440 x 1080 that you cite, that is 1440 x 1080 HD anamorphic 16:9 indicating that the 1440 x 1080 is stretched by that 16:9 flag to 1920 x 1080 for display after encoding.

     

    In the case of your 720 x 576 with the pixel aspect ratio = 1.0940, that is 4:3, not 16:9 (widescreen).

     

    As you know, Premiere Elements allows for one project preset and that should match the properties of your source media. When you have a mixed Timeline (varied video formats/frame aspect ratios/pixel aspect ratios/and display aspect ratios), then priorities need to be set.

     

    What I would suggest you look at if it has not been mentioned before or if you have tried it is the following:

     

    If you want a HD export

    Premiere Elements XX project preset (new project dialog) = PAL AVCHD HD1080i25

    Drag the imported 1440 x 1080 HD anamorphic 16:9 to the Timelne

    Import the 720 x 576 into the project and drag it to the Timeline

    Scale the 720 x 576 to fill the space in the Edit Mode Monitor (quality may deteriorate scaling 720 x 576 to 1920 x 1080 space, but give it a try. It may give you surprisingly acceptable results.

    If not

    a. consider a SD project counterpart where you scale down the 1440 x 1080 HD anamorphic 16:9 to fill the 720 x 576 space in a PAL DV Standard project.

    or

    b. consider keeping the HD project and using the SD in a picture-in-picture type arrangement in the 1920 x 1080 Edit Mode Monitor space.

    or

    other.

     

    For HD export, I would look at the 1920 x 1080, rather than 1440 x 1080 HD anamorphic 16:9 choices, such as, /MPEG/with preset

    MPEG2 1920 x 1080i25 (gives .m2t file) or /AVCHD/ with preset MP4 H.264 1920 x 1080p25 (giving .mp4 file).

     

    Please review.

     

    Thanks.

     

    ATR

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 10:43 AM   in reply to Bill Hunt

    Bill Hunt wrote:

    . I would investigate those. One, Red Giant's Magic Bullet Instant HD, has been used by many, though some users were not pleased enough to purchase it. Just something to consider.

     

    Good luck,

     

    Hunt

    No point in investigating. Instant HD was not disigned for Elements.

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 11:20 AM   in reply to JustinWyllie

    Your entire workflow all depends on what your end delivery is going to be.

    Are you going to make a dvd or BD or just for the web?

     

    Scaling clip 2 completely (that is without black bars and loosing top an bottom of the clip) up in a HD environment is going to be a disappointment. Scaling is going to be 250%. Rather a lot.

    Clip 2 is 4:3, you will have to settle for black bars on each side the scaling will be 'only' about 200%

    an you can fill it with a blurred background from the same clip.

    The settings are PAL - avchd HD 1080i 25.

     

    4-3 in HD with blur.png

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 11:18 AM   in reply to JustinWyllie

    Next time film in 1920x1080, that will make things less complicated (get a larger card).

     

    1440x1080 has a different pixel aspect ratio (1,33) then 1920x1080 (1.0).

    To make things a bit complicated 1440x1080 is actually 4:3 but with a pixel aspect ratio of 1.33 it will display as widescreen.

    This type of format is called anamorphic, so is clip 2, but just forget all about it.

    To avoid 1440x1080 being displayed wrong (which means the video is stretched in the length and depending on which format you use also) export to 1920x1080.

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 11:23 AM   in reply to JustinWyllie

    PAL - avchd HD 1080i 25 preset is 1440x1080.

    The avchd full HD preset is 1920x1080.

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 11:28 AM   in reply to JustinWyllie

    Justin

     

    Here is my take on all this.

     

    As I said, 1440 x 1080 HD anamorphic 16:9 and 1920 x 1080 16:9 square pixels will both display at 1920 x 1080. One needs a flag to direct the player to stretch the video, the other does not.

     

    That Pixel Aspect Ratio of 1.3333 is a correction factor so that the 1440 x 1080 displays after encoding as 1920 x 1080. That 16:9 flag depends on the player respecting the pixel aspect ratio to display the video at 1920 x 1080.

    http://www.sharbor.com/tutorials/1844.html

     

    One of the major functions of setting the project preset is to direct the program to set up a space in the Edit Mode Monitor from which to edit your video. That monitor space for your 1440 x 1080 HD anamorphic 16:9 is not 1440 x 1080, but 1920 x 1080 to reflect the display space.

     

    One way of thinking is that selecting 1920 x 1080 instead of 1440 x 1080 HD anamorphic 16:9 at export bypasses the opportunity for the player to misinterpret or having problems with the flag directive to take the exported 1440 x 1080 to 1920 x 1080. No need if you export 1920 x 1080.

     

    I can go further into square pixels (1.0) which is associated with 1920 x 1080 if you want. But for now I will see if what I wrote has been helpful.

     

    Thanks.

     

    ATR

     

    Add On...After I posted this message to you, I saw the post exchanges between you and Ann Bens.

    My choice of project preset would be PAL AVCHD HD1080i25 and focusing my attention to the 1920 x 1080 export choices as suggested by my earlier posts.

     
    |
    Mark as:
  • Currently Being Moderated
    May 22, 2013 11:40 AM   in reply to JustinWyllie

    Justin Wyllie

     

    Thanks for the follow up. We are glad that the contributions from all were helpful.

     

    And, good questions, troubleshooting, and follow up on your side.

     

    Continuing success as you move forward in your projects.

     

    ATR

     
    |
    Mark as:

More Like This

  • Retrieving data ...

Bookmarked By (0)

Answers + Points = Status

  • 10 points awarded for Correct Answers
  • 5 points awarded for Helpful Answers
  • 10,000+ points
  • 1,001-10,000 points
  • 501-1,000 points
  • 5-500 points