What does “CONVERT” mean?

Posted on June 9, 2012. Filed under: Definitions | Tags: |

CONVERT is a tag required by the 720p x264 TV Releasing Standards,[1][2]

│   - "Native" refers to the standard in which the video was produced (e.g.   │
│     NTSC or PAL). NTSC produced video is native to NTSC, PAL produced video │
│     is native to PAL. PAL produced video that is broadcast in NTSC is       │
│     converted. NTSC produced video that is broadcast in PAL is converted.   │
│   - Converted video that has significant artifacting (e.g. blended frames)  │
│     and cannot be reversed to native must use CONVERT tag                   │
│   - Converted video that does not have significant artifacts does not need  │
│     convert tags and may not be nuked for the conversion                    │
│   - Native releases are allowed after those tagged CONVERT. Use NATIVE tag. │

and the music video standards.

    - "Native" refers to the standard in which the video was produced, e.g. NTSC or PAL.
       NTSC produced video is native to NTSC, PAL produced video is native to PAL.
       Videos may be either IVTC'able or progressive.
       PAL produced video that is broadcast in NTSC is converted.
       NTSC produced video that is broadcast in PAL is converted.
       In some special cases converts can be restored to their original progressive state.

An example of a release that was nuked for not using the CONVERT tag:

TV-X264  Episodes.S02E01.720p.HDTV.x264-TLA              2012-05-11 22:08:56
NUKED:   field.shifted_i.imgur.com.IHnON.jpg [ ZoNeNET ] 2012-05-12 00:56:21
UNNUKED: get.dirfix [ Sheep ]                            2012-05-18 22:09:46

Episodes.S02E01.CONVERT.DiRFiX.720p.HDTV.x264-TLA 0F 0M  2012-05-18 22:05:58
field shifted

This is how a shifted field looks like according to the nuke message.

Let’s explain shifted fields. If the capital letter is top field, and the small letter is bottom field, then ordinarily the fields will be lined up into frames (where the top field/bottom field combination comprises a frame):

A B C D E F
a b c d e f

But with shifted fields, one of the fields is shifted over by one frame, like so:

A B C D E F
b c d e f g

This will appear as interlacing when opened in software. Source

blended frames

This is what blended frames look like.

Ghosted or blended: you may seem to see “double images”.

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