On 2020-10-01 06:27, Mark Filipak (ffmpeg) wrote:
On 09/30/2020 11:56 PM, Jim DeLaHunt wrote:
On 2020-09-30 20:36, Mark Filipak (ffmpeg) wrote:
Continuing with relatively non controversial entries:
d-NTSC [noun]: 1, The digital equivalent of NTSC distinguished by
binary metadata:
720 samples/row: 'horizontal_size_value' = 0010 1101 0000
'horizontal_size_extension' = 00
480 rows: 'vertical_size_value' = 0001 1110 0000
'vertical_size_extension' = 00
4:3 DAR: 'aspect_ratio_information' = 0010
30/1.001 FPS: 'frame_rate_code' = 0100
'progressive_sequence' = 0 & 'progressive_frame' = 0
d-PAL [noun]: 1, The digital equivalent of PAL distinguished by binary
metadata:
720 samples/row: 'horizontal_size_value' = 0010 1101 0000
'horizontal_size_extension' = 00
576 rows: 'vertical_size_value' = 0010 0100 0000
'vertical_size_extension' = 00
4:3 DAR: 'aspect_ratio_information' = 0010
25 FPS: 'frame_rate_code' = 0011
'progressive_sequence' = 0 & 'progressive_frame' = 0
It seems to me that these are no longer glossary entries — or, only
the first line of each is a glossary entry. ...
…The sentence is a statement followed by a list of metadata that
distinguishes the subject...
Do you have any suggestions? Should I just forget this glossary idea?
What makes sense to me is a glossary which includes the entries:
d-NTSC [noun]: 1, The digital equivalent of NTSC
d-PAL [noun]: 1, The digital equivalent of PAL
Then a table of XYZ metadata entries which have been found in the wild:
[Display the following table with fixed-width font]
Kind of data | Metadata field entries
| Metadata key | Metadata value | Meaning
---------------+-----------------------------+----------------+----------------
d-NTSC | 'horizontal_size_value' | 0010 1101 0000 | 720 samples/row
| 'horizontal_size_extension' | 00 |
| 'vertical_size_value' | 0001 1110 0000 | 480 rows
| 'vertical_size_extension' | 00 |
| 'aspect_ratio_information' | 0010 | 4:3 DAR
| 'frame_rate_code' | 0100 | 30/1.001 FPS
| 'progressive_sequence' | 0 |
| 'progressive_frame' | 0 |
---------------+-----------------------------+----------------+----------------
d-PAL | 'horizontal_size_value' | 0010 1101 0000 | 720 samples/row
| 'horizontal_size_extension' | 00 |
| 'vertical_size_value' | 0010 0100 0000 | 576rows
[… etc …]
And, you need to fill in "XYZ", which stands for the context: metadata
of which format or specification? Of an MPEG-2 video? Of the ISO file
corresponding to a DVD? Of something else?
—Jim DeLaHunt
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