On Sun, May 10, 2020 at 5:16 AM qw <applema...@163.com> wrote: > Hi, > > I have one question about movenc.c: > > https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/movenc.h#L116 > > What does it mean, i.e. 'active picture (w/o VBI) height for D-10/IMX' ? > And, what is D-10/IMX? >
VBI stands for "vertical blanking interval", so the "height" variable includes only the true picture data, without any padding associated with vertical blanking. D-10 and IMX are other names for the SMPTE 356M professional audio/video format. You can read a bit about it at https://en.wikipedia.org/wiki/SMPTE_356M, but you'll probably need to read the actual SMPTE document to find out why that comment is attached to the variable declaration. I know nothing about it, myself. > > Thanks! > > Regards > > Andrew > > > > > _______________________________________________ > Libav-user mailing list > Libav-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > libav-user-requ...@ffmpeg.org with subject "unsubscribe".
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