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glaustin
glaustin
Inspiring
January 10, 2018
Question

.MTS Interlacing

  • January 10, 2018
  • 5 replies
  • 2265 views

Hi Guys

I'm (finally) using CC2018 and have just exported an .mts file based project.

1. I dragged the clips into the timeline to create the sequence,

2. then I exported using the project settings, but set it to medium to keep the file size low. The sequence is fields based (upper first) and the export is the same.

3. But the result is a bad export with interlacing lines.

It's not for broadcast, so I've just reset the export parameters to progressive scan but I'd like to get to the bottom of why the export is so poor in case I need to export a fields-based file in the future. Has anyone any thoughts on why exporting using the same project field settings in export should return such a badly interlaced file or tips on how to avoid this?

Regards,

Graham

This topic has been closed for replies.

5 replies

glaustin
glaustinAuthor
Inspiring
January 11, 2018

Does anyone have any comments on these settings?

Averdahl
Community Expert
AverdahlCommunity Expert
Community Expert
January 11, 2018

Does anyone have any comments on these settings?

Yes, if you export to H.264 and the goal is to watch the footage on a computer screen, smart phone, pads, upload the clip to YouTube, Vimeo, etc, you must to change the Field Order in the Export Settings dialog from Upper First to Progressive in order to get rid of the interlacing issues you see.

Thumb of rule:

Exporting a file to burn a DVD or Blu-ray, keep the interlacing when exporting.

Exporting a file to be viewed on computers, smartphones, pads, YouTube, Vimeo, etc export as Progressive. (a.k.a de-interlacing)

    Richard van den Boogaard
    Community Expert
    Richard van den BoogaardCommunity Expert
    Community Expert
    January 10, 2018

    Which camera was used to shoot the footage?

    I know that the Canon C100 records progressive in AVCHD and writes .mts files in a Progressive segmented Frame (PsF) wrapper. For some reason, PPro interprets this footage as interlaced, meanwhile it really is progressive. I have to use Interpret Footage and change it from Upper field to Progressive (None) in order to work correctly with this footage.

    Are you sure your camera source files are interlaced?

    Please check.

    glaustin
    glaustinAuthor
    Inspiring
    January 10, 2018

    The camera used was a Sony NX100. I use a Z150 and don't have this issue with .mxf files.

    M
    Meg The Dog
    Inspiring
    January 10, 2018

    Are you viewing the exported file on a tv monitor which supports interlaced material, or on your computer screen which does not? Any interlaced file is going to show artifacts when viewed on a computer screen.

    These artifacts will not be apparent if viewed on a monitor that supports interlaced video.

    Premiere avoids this display problem in the editing process by suppressing one field in the Program Monitor so that you are viewing one field only of the two field composite frame.

    If you were to with the display to Display Both Fields, you would see the artifacts caused by playing interlaced material on a progressive display appear in your Program Monitor.

    Extra, unasked for two cents - there is nothing inherently wrong with working in interlaced footage. You just need to preserve the correct field dominance throughout the post process, and then display it on a monitor that displays interlaced footage correctly (most tv sets).

    MtD

    glaustin
    glaustinAuthor
    Inspiring
    January 10, 2018

    Thanks, Meg. Yes, it's PC monitor. Maybe I'll export a copy to check-out on a TV just to see if the interlacing artefacts disappear.

    E
    excited_Genie16B8
    Legend
    January 10, 2018

    You're exporting interlaced material to an interlaced format.  Scan lines aren't all that surprising.  To get rid of them, shoot, edit and export in a progressive format.

    glaustin
    glaustinAuthor
    Inspiring
    January 10, 2018

    Thanks, Jim. As I mentioned, I normally use film with a Z150 set to XAVHD, so it's not a problem. But people I work with use an NX100; hence this little issue.

    Ann Bens
    Community Expert
    Ann BensCommunity Expert
    Community Expert
    January 10, 2018

    Export to what format? What is the end destination of the file?

    Dont use Match Sequence Settings.

    Post export settings with left tab to output with image

    and post a screenshot if mediainfo with a mts clip.

    glaustin
    glaustinAuthor
    Inspiring
    January 10, 2018

    https://forums.adobe.com/people/Ann+Bens  wrote

    Post export settings with left tab to output with image

    and post a screenshot if mediainfo with a mts clip.

    Hi Ann

    Sorry for being a right thickie and I know It's going to be obvious, but I've never posted and not sure which left tab you're suggesting (having a senior moment...)

    Ann Bens
    Community Expert
    Ann BensCommunity Expert
    Community Expert
    January 10, 2018

    The left tab of the sequence settings like this:

    and please post mediainfo on both camera's clips used.

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