s->hsub = pixdesc->log2_chroma_w;
s->vsub = pixdesc->log2_chroma_h;
- s->bpp = av_get_bits_per_pixel(pixdesc) >> 3;
+ s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
+ 1 :
+ av_get_bits_per_pixel(pixdesc) >> 3;
s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;