My understanding is that in the US NTSC is broadcast bottom field first. Thus, the TV will display the bottom field, then the top field. I am caputring from a US broadcast. Now the bttv driver alledgedly delivers frames top field first, although streamer doesn't set the interlacing tag in the yuv4mpeg header. Consequently, I set the interlacing flag to "top field first" in the yuv4mpeg header when I pipe the yuv file into mpeg2enc. Now mpeg2enc has an option "--playback-field-order" which can be set to play bottom field or top field first. Should I be setting this to bottom because bottom fields are broadcast first in the US, and hence should be played first?
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