Category Archives: 3D

3D, 3D Tech, Editing

How to create 4K 3D Videos for Youtube

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Using Sony Vegas Pro (and presumably newer version of Sony Movie Studio)

  • I used the MainConcept AVC/AAC (*.mp4, *.avc) codec
  • I selected Custom Frame size and set width to 3840 and height to 1080.
  • I set maximum bps to 40,000,000
  • I set average bps to 32,000,000
  • On the Project tab, I set Stereoscopic 3D mode to “Side by side (full)”
  • Upload the file to Youtube
  • Add the following as individual “tags” in the Youtube “tags” section:
    yt3d:enable=true
    yt3d:enable=LR
    yt3d:aspect=15.99:9
    yt:crop=16:9

After Youtube recodes the video, the viewer will include 1440 HD and 2160 4K viewing options. Select your 3D viewing options and select 2160 4K – note, you need a fast Internet connection. This produces a much higher quality 3D image than the normal Youtube 3D configuration.

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Using Magix Movie Edit Pro (version 13 – should work on 14 too)

  • Compress the output to an mp4 video as 3840×2160 (not 1080). This creates a vertically stretched “half frame” on the left and right – however, since its 1920 wide, we end up retaining all of the original 1920×1080 on each stream.
  • Set to side by side, half frame (didn’t work for me when I set to full frame side by side)
  • Select a high bit rate such as 40 Mbps or faster
  • Upload to Youtube with the tag yt3d:aspect=15.99:9
  • In Advanced settings, select “This video is already 3D, and then select “Side by side: Left video on left side”.

After encoding, this shows up as a 4k 2160 3D video and plays as you would expect, but at a much higher image quality.

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Recommend using Side-by-Side 3D for Youtube uploads

This past week I mastered several video clips taken at Seattle’s Fremont Solstice Parade and Honk! Fest West – all in 3D, most of them shot using a Sony TD10 3D camcorder.

When I watched them on Youtube they looked basically like over compressed crap. It did not seem to be matter if I used Sony Vegas or Magix Movie Edit to produce the file.

Tonight I did some experimenting and concluded that given two identical upload files (in terms of bit rates) to YouTube – but with one in side-by-side format and the other in top-over-bottom format, that the top-over-bottom format came out looking worse. Consistently.

This seems odd since the TD10 records two full 1920×1080/60i streams. When combining for 3D, we should be able to take the odd scan lines from one stream and the even scan lines from the other stream and not worry about de-interlacing since we only need half the scan lines.

Well, for whatever reason, the side-by-side looks noticeably better than the top-over-bottom after uploading to Youtube. Both formats looked fine on my 3D TV when I played them directly from the original MP4 files on a hard drive.

Recommendation: Use side-by-side format when uploading 3D to Youtube.

Would be interested to know if others have experimented with these formats?