[x264-devel] proposal: nal-hrd and interlacing

[Erik Slagter]

> Does the same thing happen for progressive material?
> This should be an issue with general playback. It shouldn't have anything to do with interlaced.

No because it is interlacing specific.

To recap: without using nal-hrd the material is played with the wrong field order (bottom 
field first), although the option -tff has been used. When nal-hrd is used, the playback 
field order is correct. This has been suggested by some expert, I didn't see the relation 
but it clearly works.

So that's why I'd like to have x264 (or the lib) issue a warning when interlacing is 
selected but no nal-hrd, as to prevent others to shoot them in their foot as well.

I can't find hardly any information on nal-hrd, so I cannot judge if this is expected 
behaviour. I guess that settopboxes tend to be quite pedantic on streams adhering to 
standards.

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