@@ -755,6 +755,8 @@ static av_cold int encode_init(AVCodecContext *avctx)

         s->transparency = desc->nb_components == 4;

         if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)

             s->bits_per_raw_sample = 8;

+        else if (!s->bits_per_raw_sample)

+            s->bits_per_raw_sample = 8;

         break;

     case AV_PIX_FMT_RGB32:

         s->colorspace = 1;