FLAG_B_FRAME
value |= !(frame->flags & FLAG_B_FRAME) << 25;
if (!(dpb_frames[0].flags & FLAG_B_FRAME))
value |= !(frame->flags & FLAG_B_FRAME) << 25;
value |= !(frame->flags & FLAG_B_FRAME) << 25;
value |= !!(dpb_frames[0].flags & FLAG_B_FRAME) << 24;
value |= !!(dpb_frames[0].flags & FLAG_B_FRAME) << 2;
flags |= FLAG_B_FRAME;