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  1. Hi.

    I have noticed that when I take interlaced footage and export it into mp4 with the proper settings (eg: top field first or bottom field first), mp4 usually has a problem with the interlacing. Eg: during movement you can see the bars and everything is not lined up. But converting from progressive to progressive into mp4 works fine.

    I have seen this problem of interlaced converted into progressive mp4 with VHS captures, Hi8mm captures and HD camera footage from a Sony HDR-XR550V.

    Is mp4/mpeg4 designed for progressive rather than interlaced? mp2/mpeg2 seems to be better with interlaced video.

    Thanks.
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  2. I know nothing about MP4s and never encode interlaced, but it sounds like the video isn't being de-interlaced on playback as it should be, which would probably be a player issue. What are you using for playback?
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  3. Are you viewing the footage on a monitor as most monitors don't have built in de-interlacing like TVs.

    Playing the footage back on a TV should help with the visible interlacing.

    Have you tried encoding the footage to progressive as that is what I normally do with interlaced footage which works well with right encoder settings.
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  4. I understand encoding video as interlaced to a certain extent. The video will be de-interlaced on playback and I'm thinking the de-interlacers in hardware players are probably similar to yadif in quality anyway (not that I've done much comparing), but de-interlacing with QTGMC is probably still the best option quality-wise, if you can put up with it being quite slow. And if you de-interlace when encoding, there won't be any interlaced playing problems.
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  5. Formerly 'vaporeon800' Brad's Avatar
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    Originally Posted by SyncroScales View Post
    Eg: during movement you can see the bars and everything is not lined up.
    Huh?? Attach a screenshot.

    Is mp4/mpeg4 designed for progressive rather than interlaced? mp2/mpeg2 seems to be better with interlaced video.
    As far as H.264 goes, European 1080i broadcasts, original AVCHD camcorders, and certain Blu-ray releases (like concert videos) all use interlaced encoding just fine.
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  6. Originally Posted by SyncroScales View Post
    I have noticed that when I take interlaced footage and export it into mp4 with the proper settings (eg: top field first or bottom field first), mp4 usually has a problem with the interlacing.
    The MP4 container definitely can contain interlaced video. And any decent player will handle it properly if it's encoded and flagged properly.

    MPEG 4 codecs (xvid, divx, h.264, avc) can handle interlaced video properly.
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  7. Thank you for the information.

    I'm using VLC media player to watch video. and a computer monitor.

    I tried to change the video clip into progressive for export. That helped a lot. I also raised the bit-rate and in this situation it helped too, even for the interlaced top-field first option.

    What is QTGMC?
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    Originally Posted by SyncroScales View Post
    I'm using VLC media player to watch video. and a computer monitor.
    By default, VLC doesn't deinterlace. Set it up in "preferences" and choose any of several deinterlace methods, including yadif.

    There are better players.

    Originally Posted by SyncroScales View Post
    I tried to change the video clip into progressive for export. That helped a lot. I also raised the bit-rate
    And re-encoded your videos?

    Originally Posted by SyncroScales View Post
    What is QTGMC?
    http://forum.doom9.org/showthread.php?t=156028
    Last edited by LMotlow; 22nd Jul 2015 at 06:52.
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